The R6P code is interesting. One of those less commonly documented ones that groups together J65, KC4 and N10. Most of the R-codes are group codes. I think that is where we see the driveshaft and such added in to other ones.

Mark.

 

I would hope that no one takes anything said here too seriously. We all feel strongly about thirdgens, and just because the discussion can get a bit heated, no one should take it personally.

I enjoy your detailed posts of what you've found on your cars, and the R7U side of things is definitely interesting and not well documented.


I can tell you without a doubt that 1LE springs are standard parts. They are generally the same as every other FE2 suspension thirdgen. The same spring codes were used at least back to 84, if not earlier. I had this well documented, but that documentation is lost to time.

GM started using the JG1 shaft in 1988 cars. You'll see them often in L98 Irocs and GTAs. My impression is that GM used it to reduce weight more than anything, because a lot of the cars that came with the JG1 shaft aren't G92 cars. After 90 I haven't seen nearly as many JG1 shafts. They don't get popular again until the 93-97 LT1 cars with their recall for NVH issues.

The suspicion that the aluminum shaft has more to do with weight might also explain how and why it would have been used on the 1LE. 1LE brakes are heavier than the 10.5" brakes. It's not hard to believe that GM saw some of the deletes and substitutions as a way to compensate for the increased weight.

 

Not so fast... The G92 requiring AC Delete on the Firebird is correct.
In 1991 and I would assume 1992, R6P on the Firebird is basically G92. For whatever reason Pontiac decided to group the "G92" items under the R6P "Performance Enhancement Group" rather than use the G92 "Performance Axle Ratio" code. The only time I've seen a 91/92 Firebird with G92, it's also been a 1LE. Otherwise, you'll only see R6P.

I'd suspect what the memo is getting at, is that to get a 1LE Firebird, it had to be ordered as a G92 car without A/C, similar to the Camaro.

Now I have to wonder if any 91/92 Firebirds with G92 actually have GU6 instead of GU5. Hmm...

 

On the subject of the aluminum driveshafts. I have pulled an aluminum driveshaft out of a loaded 86 trans am back when it was only a couple yrs old and was very original. aluminum spoke spare too.




On the 1LE gas tank, I have 2 89 formula 350s that are about 4,000 cars apart by vin#s. The early car had a non-1LE fuel tank and the 1st design 2 piece rear caliper brackets.
The later car has the 1LE tank and the 2nd design 1 piece rear caliper bracket.
Soooo someplace in there the 1LE tank either became standard or my 2nd car just got lucky.

I almost ordered a 92 1LE bird, just had to check the 1LE box to get it, that triggered the other required options, R6P, no a/c bla bla bla. Still have the hand written order sheet.
Had a request in to zone guy to add A/C on it and I was told it could happen.... but it didn't. (long story)

 

Here you go...also debunks the premise that these were stripped down cars although this was a customer order, not a race team car.

 

The aluminum spoke spare is not the 1LE spare Tony as I'm sure you know. Certainly developed for weight savings it has a completely different look. The 1LE spare would likely pass for a regular one unless you had a magnet.

Non 1LE aluminum spoke


Correct 1LE Aluminum Spare

 

Yup, that's why I said aluminum spoke spare. As you pointed out, the 1LE aluminum spare is very different.
Just thought it may be worth noting that the loaded 86car had a few weight saving features.

 

This has become a fascinating thread......

BTW, the Al "1LE spare" was on all rear PBR equipped 3rd gens.

 

I assume the window sticker is a repro? The 3.45 gear ratio in 91 would be a bit odd if it's not.

I should have clarified, by "Now I have to wonder if any 91/92 Firebirds with G92 actually have GU6 instead of GU5. Hmm..." I meant L98 + G92, since that's the other supposed error on the GM memo.

Good stuff!

 

No that's the original one - has a tear in the upper right, last owner got it laminated at work.

Only the LB9/T-5 Cars got the GU6, no evidence the L98/Autos did.

 

If so, I just learned something new. 3.45 = BW rear. I thought that ended in '89 with leftovers being used up on '90 model year cars.

 

Sadly, not my 89 formula 350 she had a steel spare back there. (never out till I took ownership of it)

 

Debate the margins and details all you want, but there's no getting around the following:

1. The top performing thirdgens came from 89-92, and they are the:

• 1LEs
• Firehawks
• TTAs

2. Performance is the main driver of desirability and value in a sports car.
3. As the market matures, the top performing cars will be the most sought after (and expensive) cars when compared to others of comparable condition.

 

I'm betting it has a 3.42 10bolt under it.
It did, It's probably a typo or somehow the printing code was never updated after 1989.

 

Good god...I don't think you guys realize how in depth you are getting on these cars ...its really amazing to read all this stuff...I'll be honest I HAVE NO IDEA how you guys are able to remember this stuff...the documentation you guys have...and the knowledge. Jesus! I'll be honest...I feel like sometimes my history and knowledge of NASCAR is overwhelming to a lot of people...but man this stuff is sooooo overwhelming to me at times. I feel like I'm in advanced math class and my brain is being crammed too much in one day! If people only knew this stuff about these cars they would have SOOOO much more appreciation for them.


It really pissed me off when I first got my IROC-Z...I told a lot of guys at work...some of them thought it was great and others called it a "*******" car...really bothered me and somewhat hurt my feelings (I have tough skin but man you cant put me down like that lol)...I tried to explain things to them and they just laughed me off. I'v always been an avid car guy. I don't know if you guys watch it...but I'm a BIG fan of Jay lenos garage (and him as a person, nicest Hollywoodite out there!!!)...mainly the Youtube channel one...I really am trying to make a serious effort to compile the most ACCURATE information on the IROC-Zs mainly...and also the I guess you could say the secret codes that a lot of people have NO idea about with these cars. I think it would be really interesting for an outsider (car enthusiast) to understand all these crazy and I dare say almost ridicules amount of options and what not available with these cars. And then there is the race car 1LEs Pontiac for sale on this site...OMG...that whole car. There was a very interesting way it was sold and obtained in the beginning I believe (I need to re read and get my facts straight on that 6 mile long thread)...then the VIN...that was interesting as well with the dates on it...then this part like I mentioned before "About your car, my guess is it was ordered by a GM executive on John's behalf. The executive would have driven it for the required 4 months, then turn it is. John could have worked with a fleet coordinator so he could "tag" the car through the employee purchase program. In the 1990s, there was a lot of shenanigans played by GM employees who raced by ordering special edition high performance cars as their company cars. John Heinricy (another former A-Sedan racer, and my former Director) ordered several ILE Camaro and Firebird cars over the years, drove them as his company car, purchased the car at a discount then converted them into a race car. The employee purchase price would have been 80% of the MSRP: meaning Bennett probably paid $14k for this car.", that's the Blue 1LE Pontiac for sale now on the page

All this IMO would just make the coolest story on that show...I want to try and at some point in the not too distant future write in to Jay and who knows...maybe be acknowledged. I think I would have better luck writing to one of his mechanics FB messenger page...there all super cool guys as well, and speak very highly of there boss. And who knows, maybe there team could reach out to some third gen owners they know and do a segment on the cars. That would be cool...I know in the past I was an official Wikipedia editor as well...that page needs some work on the third gens...it needs MORE DETAILS and more in depth information of the cars besides "In 1987, this was available for the first year", I'v posted stuff before for a NASCAR race team Front Row Motorsports etc its stayed there for years...


I'd like to of course get EVERYTHING I write proof read by some of the people on this site...and make adjustments as need be to make SURE everything is AS close to 100% as possible with the IROC-Zs mainly and or Pontiacs as well. I'm sure this would take me a lot of time and effort...and headache at times...but once it was done I think would bring maybe better awareness to the cars. I feel like the stories and tales are endless with these cars that's for damn sure. I think if more people who OWNED these now and in the past knew more about them, you would have less turn over rate with people selling them...and OR buying them and NOT understanding the real work it takes to get them back into shape...granted there not a 70 Camaro...but all due respect most people that buy those cars have lots of cash already...and there are some that need work...but a lot are already in good shape and the rest completely trashed beyond repair for the AVERAGE person...these cars to me are that in between area...where you can pick up a ragged out one cheap...but to get her back in tip top shape cost a lot...people I think under estimate the 30 year old wear on these cars...bc imo they still look somewhat modern and have aged well. There are some body styles that take a couple of decides to really come in and be appreciated....but others seem to stay ageless and only continue with age to be more appealing...to me these cars are exactly that.


I'll give an example...I know a guy that has owned a bunch of IROC-Z...hes an middle aged guy, but he dosent know really anything about the cars when I asked him questions about the more in depth things...he uses this what I think is lacking in information paper small book from along time ago that he goes off of...and imo, its just outdated...in adequate at times and needs more information on it.


Okay back to reading thirdgen forums now for me lol. Thanks for all the input and cool stories guys! Really really cool!

 

10 bolts under both the 91 1LE Z28 & 91 1LE Formula - I just went out and checked.

Of course there's a 9 Inch under the 90.

 

My 91 Z28 is GU6 RPO as well but the GM docs say that's the 3:42 Axle Ratio.

 

Is there anyway I can get these build sheets or window sticker sheets like you guys have reproduced for my IROC-Z...or do I just have to accept its never happening lol

 

I did a Carfax and stuff and only tracked back my car to 91...I wrote the dealership I think it came from...I could be wrong....but I'm trying to get proof it came from there at some point...I emailed the owner (original owner from then), and the president of the dealership and am trying to get them to take time out of there day to look into maybe some old archives or something...a response of some sort would be awesome...I told them I would even cut a personal check for them to investigate into it...just emailed again, its been 2 weeks...maybe I will get a response this time...

 

So cool you have all that neat documentation...wish I did for mine...sigh

 

Ha...just got a call back from the President of the dealership. Lawrence Chevrolet in Mechanicsburg PA...said there records don't go back that far ...ran the VIN search just to see and nothing...sad.

 

You can get the documentation you want from the GM Media Archive - http://www.gmmediaarchive.com/?page=1

They may also be able to reproduce the window sticker for you. The documentation I have for each of my cars is there because each owner knew they were special & kept it.

I have all of the documentation from my 87 IROC because I ordered it new and kept EVERYTHING even after I sold it two years later. When I found the car again in 2014 it was nice to know where it was & that I still had it all.

 

Hey thanks! I emailed them!!! Hopefully I get a response back, if not tomorrow I will call! That would be SOOOO cool to get a reproduction one of those! And for only 50BUCKS that's nothing! Hopefully they respond back with me and AT least I can get the build sheet...if nothing else from where it was shipped to after the assembly line. Are they able to maybe know that too...or probably not?

 

For 89 ... there were 76 1LE in Canada, all of which had JG1. There was a total of 299 JG1 cars made. So yes there was non 1LE cars with it. Unsure what the trigger was ... need a reference car to search that out. G92 was 192 cars in total. So 76 of those are 1LE, the others? Not sure.

I wish Compnine would borrow me a year's data to do some cross tabulation as to what came with what. We could easily see what JG1 came with and so forth. And also document some of the R codes.

Need more reference cars!

Mark.

 

Mark,
I wasn't attacking you, so please don't take it that way. I'm in agreement with Drew here. Comparing the original 1LEs to the 60's COPO cars is ridiculous as the value in those cars is due to the engine/performance upgrades that were in limited supply. The same with the 70s Hemi Cuda. If the 1LE had a 350 when the rest of the cars were 305s, that would change this entire discussion, but all we're really talking about are brakes. Oh, and you said there was a price to the 1LE package. You are correct.

I will also agree with you about the R7U suspension. I know I have one build sheet for an R7U and the springs listed are not listed on any other car, 1LE or otherwise.

The 1LE is a special car as it has a track designed component associated with it, but it would be better if the upgrades were more than the brakes. And I would pay more for a 1LE over a regular IROC-Z or Z28, but not thousands more. Again, there wasn't much to the package to make it stand out as "spectacular".

 

I think the point was simply that 3.45 wasn't the ratio for a 5.7L car ... depending how you read it. Yes the performance axle was, but the "(3.42)" was mis-leading. (curious why you had to screen shot my reply :-/ )

In Canada at least, in 1990/91 model year, there were 106 1LE Trans Ams, and 106 cars with G92. So yes, G92 was only with 1LE. No R6P listed as such, but may not in the database or simply was an order code.

Mark.

 

So to help a much less educated person out on understanding all this...so essentially a 1LE car was more of a "triggered to order type of deal"...and essentially WITH that said...it was basically the performance options MAXED out to make it the 1LE package...meaning okay so my car has the G92, J65, and KC4 package and is the 305 5 speed, BUT the 5.7 had this standard I believe? Cant remember...regardless of my point...my point is that WHAT YOU guys are saying is that besides the brakes...everything besides the BRAKES could be ordered on these cars separately. Example...if I wanted the aluminum drive shaft I could just ask for it...but that didn't necessarily mean I had to get the G92, KC4, and J65 options? And ALSO it was I guess more common to see the 1LE cars with all the delete options BUT it was not mandatory...I was under the impression that you had to "trigger" the 1LE code to get it ordered by I guess C60 (AC delete and was it radio delete)...but I read that some folks had 1LEs with AC etc....right??? If I'm wrong I'm sorry...been smoking my brain on all the new stuff on this post...it gets confusing at times....I'm almost there tho lol

 

Two of the three cars listed are exactly as I mentioned. The TTA had a turbo charged V6 that no other Trans Am or GTA had, and it was the fastest. The Firehawks also had upgraded transmissions and engine components that no other 3rd gens had. That makes them valuable, as resale prices have shown. The 1LE has a race heritage to it, but like I said, it would be nice if it had more than just brakes. They are still cool cars, but I can't see a brake job being worth thousands more than a regular production car. They should've added engine, suspension, something, to separate it from the rest

 

Jeremy,
To get the 1LE, you needed to order a L98 with G92 and AC delete, or the LB9 5 speed with G92 and AC delete. If you ordered you car with these options, and AC, you did not trigger the 1LE code. Now, G92 was available as a performance axle on the IROC-Z and later Z28s. When ordering G92, other options were required, like the KC4, J65, etc, so they were not 1LE specific, but were required with the 1LE because you had to have G92 as part of the 1LE trigger.

The 1987 IROC-Z was the only year, that ordering the L98, you got the G92 options and requirements as mandatory. In 1988, the first year of the 1LE, you could get the L98 with highway gears, so you needed to check the box for G92 to get the performance axle and other required options.

 

http://gmtips.com/3rd-degree/dox/tips/cams/cams.htm that's it!


Oooooo okay cool!!! I think its all come full circle NOW!...so lets take a step back in time now...so for my car for example...and please no one think I'm trying to make my car sound anymore than it is...the more I find out about these cars the more I REALLY know what the rare ones are and mine surely is not one of those haha. Anyways...so mine is the 87 305 5 speed, T-top...G92, KC4, and J65 code...and has the bigger camshaft...which I read from Drew that this was a performance upgrade bc you could get the 5 speeds then WITHOUT THE LARGER CAM, anyways mine has the larger cam shooting it up to 5000 on the tack starting out not 4500...so trying to take a step back in time (also worth noting it has basically all the options you could get on the insides including the bose sound system etc...I am by no means trying to find out the "rarity" of the car...but A-was this car probably special ordered for all this??? And B-since the 1LE package did not come out until 88...would this be considered pretty much top of the line performance for this car for that year in the 305 class minus the radio delete, AC delete etc? Or was this maybe some rich guy or dealership that got the car sent this way more than likely and either the rich guy just wanted it...or the dealership just ordered it this way as a good seller...I know its tough to assume these things...but you guys seems to really have a through understanding of WHY and WHEN things were done. Also is there any code for that camshaft I'm speaking off...or how to know it was signified on the build sheet if that makes sense...I'm going to find that piece of documentation DREW sent me and see if I can post it on here.

 

From Drews' book ... Struts for 1LE are unique. 22064153. Rears are unique as well.



Actually the history on those have a few different numbers based on 89 assembly line cars vs. parts replacement. In 1990ish, they became 1LE numbers. Early ones were R7U parts.

Other odd things were bushings, some of which became standard. Sway bars were different in that 36mm was available on the Camaro instead of the 34mm. And so on.

The only parts not found on another GM car was the brake setup and the struts/shocks. The rest at some point became stock parts.

R7U is cool as the engines are balanced/blueprinted assemblies sealed from factory. Same factory rated HP ... but certainly have some getup and go.

For me what stands out is the story where 1LE came from. From the Brembo beginings, to the PBR calipers. Same as struts and shocks, born from racing, which ended up in street form.

So sure a 1LE is just the sum of those parts. Most collectors will value the story and possible racing history. Lots of hype for sure. Pure speculation here ... but why is the ZL1 - 1LE combo out there? Marketing, sales, and hype.

Mark.

 

http://gmtips.com/3rd-degree/dox/tips/cams/cams.htm that's what I was looking for

 

Curious the new 1LE in 2013 (or whenever) wasn't much for a package either. Rather disappointing. But really same sort of thing as the Thirdgen package.

Mark.

 

Just realized the cars you have listed on ur profile...got pics !

 

Also have an 89 1LE ... but it's just a plain old car. Not much to look at. Has some brakes on it. :-)

 

lol.

Mark. The 1LE is cool. Don't let us, the ones trying to educate people that think the 1LE is similar to a COPO, get you thinking we don't appreciate your cars. We do. But, we also want the uneducated public to become educated as to WHAT the 1LE consisted of. It has it's place in history, but it's not a $100k car.

 

I might be able explain the R6P thing and the 1LE & G92 relationship. Forget the Camaro for now

1986 was the last year that G92 was used as the "performance gear" on the Firebird.

In 1989 the TTA got the 1LE brakes, but no 1LE code, and no G92 either.
From 1987 - 1992 the Formula 350 & GTA 350 should have the 3.27/3.23 gears but no G92
Likewise from 1987 - 1992 the Formula & GTA with LB9/MM5 should have the 3.45/3.42 gears but no G92.


In 1988 the Trans Am with the G92 also got the 1LE, Unlike the Camaro that had optional axle ratios the Pontiac side of things the axle ratio was tied up with the model, IE Formula, GTA would get the performance gear with the L98 & the LB9/MM5 cars. Later Pontiac introduced the R6P so that the Trans Am could also get a "performance gear" without calling out the G92(even though it ended up being standard anyway with the L98). R6P ended up being used on the Formula, GTA even though it was intended to be for the LB9/MM5 Trans Am only, as that was the only car it was technically an option. Note that the R6P (or any performance gear option) was NA on the Trans Am convertible.

The G92 was then reserved for the 1LE cars only (Pontiac). This also ties in with the TTA as those cars apparently do not have the 1LE RPO, nor the G92 RPO, because there was only one gear ratio 3.27, the gear ratio was standard, the Brakes were also standard with the TTA, therefore there was no requirement to have the 1LE RPO. Just like the GTA & Formula did not need the G92 RPO to get the performance axles either, it was part of the package, and in the US there was no way around it.

Does that make sense?

 

No kidding? Did you ever test fit to see if it clears the rear PBR brakes?

 

I went with the screenshot because quoting wouldn't include the full comment "tree". What I was getting at is that it wasn't so much an error as wording that can be misunderstood. I'd imagine the 3.42 gearing being implied as being the G92 ratio on the L98 is a similar case of unintended implication.

Yikes. Had a busy day, and now I hardly know where to jump back in the thread...

To be continued...

 

Scott,

If anything ... I have been factual to a fault. But at times, faced with "just brakes" when the truth is that there were differences. Granted nothing like an engine swap, and most won't notice a shock or a bushing. If we are to educate, then let's not just say brakes. Like the R6P, there was some logic to it. If someone wants a 1LE because of what it was, that's great. If someone is building a 1LE clone, then so many options vs. trying to find a 1LE.

Stock to stock, a 1LE, or TTA, or B4C or other limited run will most likely get a higher dollar value than an equally optioned and condition stock car. That is simply due to the perception that it is rare. Rare does not equal desirable nor valuable, but it is often the perception.

I'll continue my dissection of the 1LE and document. I had thought about selling 1LE washer fluid as it was made for high speed window cleaning, but alas, there wasn't enough left to get a formula from.

Mark.
PS. I've started working on the long stored away 88 A4U. Now that is a beast! But the correct for 1988 non-1LE, but they sure look like 1LE brakes are all done!

 

Oh we know... LOL It's enough to drive you crazy when all the minutia is bouncing around in your head, jumbling the works...

It all starts, innocently enough, right where you are now. You get interested and start digging for info. My genesis into this nonsense was getting my first thirdgen in the garage, and trying to figure out what I had. All I had available at the time was the owner's manual. After reading a couple minutes, and looking at the VIN, I was able to determine there was a 5.0 V8 with a 4BBL carb somewhere under all the hoses and emissions devices on that 83 Camaro.

Probably the next phase of infection was deciding I wanted to find a higher performance Camaro. That meant learning the differences and how to tell between an RS with a six cylinder, and a 350 TPI IrocZ without popping the hood. You read the Tech Database, pick up a copy of the Camaro White Book, and start soaking it up. Maybe write down some key RPO codes, learn how to spot and avoid 1986's, and know which VIN code tells you the Camaro you're looking at is a 350, 305 HO, etc. Back then the education was hands-on, ripe for the taking. There would be at least a half dozen thirdgens on used car lots around town to study. Local junkyards all had a dozen or more thirdgen skeletons on hand to pick through.

Learning the minutia was practical because the info was used to target the "fast" thirdgens for follow up. 2.8L cars weren't even worth talking to eager salesmen, but an 89 Iroc with an L98 was worth the trouble to get a test drive. But what the books don't tell you is how much better the 90-92 TPI cars work. Going from 87s and 89s to the first 91 L98 car was a real eye opener.

Anyway, you get the idea... Welcome to the looney bin.

 

Agreed. Two of those three examples also came with A/C.

 

I'll admit "just brakes" is a bit of an over simplification. The idea was to be direct and simple more than precise. I say 1LE is just brakes, because "1LE" appears on the B4C in some cases, and when it does - it signifies a brake upgrade and that is all.

More precisely... 1LE + B4C = just brakes. 1LE - B4C = brakes, shocks, struts, harder rear control arm bushings, aluminum driveshaft, and depending on year tank baffles + larger pump strainer. Did I miss anything?

It's a bit complicated to explain. I feel that now, 25+ years later, the original shocks and struts are going to be depreciated enough that they're not terribly important to the discussion. After 25 years is the durometer of the rubber bushings in the rear control arms still relevant? What effect has age and ozone taken on the rubber, to say nothing of wear...

I still feel the simplest explanation is just brakes. It gets right to the meat of the package, and it's EZ to understand.

 

I'm still catching up to the thread, so apologies to all for posting several times in a row instead of putting replys to several elements of the thread in a single reply...

You have your car's VIN, and I assume the RPO codes are still in the glovebox and the VIN on the car and SPID are the same? That gives you most of the relevant details on the car's equipment. The next piece of documentation to track down is the invoice. GM has them on microfiche generally. Once you have the invoice, you can usually send that information along with your RPO codes to http://www.window-sticker.com/ and they can create a reproduction window sticker for you.

Just be aware that the repro window stickers OFTEN contain errors. Members here have sent scans of original window stickers with their order, and have still received window stickers with errors. But they at least look the part, and will have mostly relevant information about the car on them. FWIW

I would also tend to think that in the current digital age, an average middle-schooler can probably Photoshop a reasonable replica of a window sticker. A little attention to detail and a few originals from similar cars to refer to, and a person could probably make a better example than the repro providers.

One other piece of documentation that you'll want to keep an eye out for is the build sheet. Generally speaking, there was a sheet with various data that would have been in the car during assembly. Some people have found them in the car years later. Sometimes they're under a seat, or under the carpet, stuffed in a door, or behind a panel. Sometimes they were never left in the car, or a previous owner or dealership prep team may have already removed them. So I wouldn't suggest ripping the car apart to find something that might not even be there.

 

My discussion is about what WAS delivered with the cars. This is the History and Originality forum right? Saying it was just brakes diminishes what it was and where it came from. (ok, I might be a bit passionate about it). It also spreads more mis-truths IMO.

Most cars are far from stock now, so much of the discussion is irrelevant I suppose if we are comparing performance numbers on today's track. Seldom is that the discussion. Not many stock vs. stock road tests to worry about. But I'll say this ... putting my 28 year old 1LE around the track left a smile that lasted for days and days. There wasn't much give in those "old" parts, but surely when it was new, it had some more to give.

This might make a good reality TV show. Crazy Thirdgen Guys.

As far as 1LE value, or any car's value, the story and paperwork are what bring or retain value. Folks who expect an option code alone to be worth $1000s are crazy. It's like the guy selling a VIN to a Superbird expecting $50,000. Where's the car dude?

Mark.

 

I understand and agree that more engine packages would be cool (especially the Heritage Concept!). But as I said in my original post - you can debate the margins, but stock for stock a 1LE Z28 will always be a better performer than a Z28.

 

Plain old car!!! What!? I have literally been searching the CG list for IROC-Z asking for ppl to take pics of there RPO codes lol....I just like seeing the car and knowing what all it had on it...thats weird...but idk...its sooooo cool to me! Ur like Drew, he dosent want to show me his cars either smh....

 

Thanks DREW! ...my VIN and stuff matches! I emailed the GM heritage place! And hopefully will get a response! Then I can move forward with the other stuff...I'll look around for that build sheet etc!

 

I never even gave it a thought, may have to dig it out and give it a go on a stock pbr disc rear.

 

Check your SPID tag for the RPO 1AZ - that denotes a sold (customer) order and would give the car a higher priority in production. My 87 was a sold car (me) and has that code - my 91 was special ordered by a female Delco executive in Rochester and she wanted the leather seats and rear defroster (and since she didn't need A/C in Rochester NY got the 1LE).

You may also want to look for the build sheet in your car - if it is a Norwood built car it is likely under the carpet on the floor in the back seat.