88blackiroc

iTrader: (1)

Ahhh i still keeping looking for these engines! Lol. I did end up today finding a 05 6.0 out of a 3500 silverado for the short block only. Which is the problem as im not sure if it was alum. head or iron. I dont think the place would know either as its a junkyard. Are there certain casting numbers for the differences i could check? And even if i buy one and it turns out to be a block with the extended crank, i could always use an adapter im assuming.

Atilla the Fun

If the pistons aren't cracked and you can afford it, then grab it! The 6.0 is much more coveted than 4.8 / 5.3 versions, and is worth the possible hassle of the longer crank. It doesn't matter if it had iron heads, ( though it didn't, that was pre-'01 ), as you'll want a pair of # '243 or '799 heads, which bolt right on using 6.0 head gaskets.

88blackiroc

iTrader: (1)

Well the "plan" is to rip it down and reuse the stock crank and forged rods and pistons for a turbo build. Then some (317 heads i think it is). It its dirt cheap to. As long as shipping isnt too much hope to get her!

Atilla the Fun

No need to change rods at all, unless you're spinning it more than 7000 RPM, or making over 1200 HP. Save that money, order the pistons for stock rods.

punkmaster98

iTrader: (5)

I dont mean to reactivate this but i have a 92 bird and an 01 suburban with a 5.3. 150k on the clock and goin strong. other than the mounts,intake,alternator etc....is there anything i need to pay special attention to so i can swap the 5.3 in? thanks for the help

five7kid

iTrader: (14)

Yes, the other things mentioned in this thread.

evo-offer

have these engines the same sensors/wiring as ls1 engine? if i swap to a ls1 intake?

BlueZee28

iTrader: (30)

The intake manifold won't require any different wiring or sensors. The only sensor that goes in the intake manifold itself is the MAP sensor and I believe that's a universal Gen III LSx part.

The harnesses are similar but not the same. What do you have and what are you using? Maybe we can help out with more info on what your setup is.

evo-offer

I'm gonna buy a camaro 88-91 that had 350 tpi engine an instead put i a lm4 engine,t56 transmisson and 4th gen dashboard. Is rhe easiest to use the engine harness that comes with the lm4? And ditch the 3gen harness under the dash board, and use a 4th gen harness?

BlueZee28

iTrader: (30)

yes if your swapping dashes too

evo-offer

Sounds good. So if i´ll got this rightm, i need:
the harness under the dash board for 4th gen dash
and the engine harness and that´s all?

BlueZee28

iTrader: (30)

Just get a dash from a fourth gen that still has all the wiring in tact. You will need to modify the truck harness a little bit but nothing major thar I know of.

evo-offer

okey. that i did know. but good to know that it isn´t to much wiring. do you know wich connectors from the 3 gen harness i need to keep?

BlueZee28

iTrader: (30)

I am not sure. I havent built a harness before just relaying what little info I do know

evo-offer

okay. thanks anyway for your help

zenish

forgive me if i missed it but will the 5.3 bolt to a 1989 700r4 or is the pattern different?

evo-offer

The pattern is different you need to use a gearvox for lsx engine

87350

there is only one bolt not used on the bell housing, the 700 will work fine

punkmaster98

iTrader: (5)

this might sound dumb but since the my truck is the 5.3L/4l60e combo with 4wd/2wd, Can I use this trans or is the 4wd irrelevant?

chas 86 formula

You keep saying LT'S your not talking about LT1 stuff are you?? If not what is LT's?

88FormulaKiller

iTrader: (8)

LONG TUBE HEADERS

Pocket

iTrader: (24)

The transfer case that makes it 4WD bolts to the rear of the trans. The trans itself is the same from 2WD to 4WD. Hiccup is the output shaft as they are different lengths between and to swap, the trans must be completely disassembled. Much easier to find a 2WD trans from the start

chas 86 formula

Oh!!!!!! DUA Thanks!!

zenish

so i can find a 4.8 or 5.3,bolt it to my stock 89 305 700r4 so i can use my stock speedometer,bolt it in using 305 mounts and camaro lsi oilpan,pickup,dipstick,and exaust manifolds, maybe having to drill new holes,maybe use the truck intake and alternator since a have a cowl hood?i assume i still have to notch the crossmember for ac.i also assume that the tpi fuel pump i swapped in needs to be swapped for a lsi pump.another thought.what about buying a lsi carb intake and adapter plate and running the tbi on the 4.8/5.3?that would save most of the rewiring and just require a custom chip.

kmcn47

something i haven't seen mentioned but have seen done in a youtube video (albeit for a cutlass) was to just cut a few inches out of the oil pan and have it welded back together

NemeSS-TyranT

iTrader: (1)

the ctsv pan fits better than the fbody pan in a stock kmember in a 3rd gen

kmcn47

is it any cheaper? what would i have to do to my truck windage tray? i assume i need the ctsv pickup tube?

NemeSS-TyranT

iTrader: (1)

need ctsv pickup tube. not necessarily cheaper. but fit like it was designed for 3rd gen.
looks like this wouldve been the pan it came with from the factory, if 3rd gens woulda came stock with a ls1.
windage tray is same as truck.
i bought 2 from a shop as take offs from crate motors.
i woulda had to bang the kmember if woulda went with the fbody pan. it only had like a
1/8 clearance from kmember. with ctsv have over 3/8 clearance

kmcn47

i'll hit up ebay for one then, probably just get the pickup tube from gmpp

25th327RS

iTrader: (2)

Before I start, I wil admit I didn't read the entire thread, and maybe this has been corrected, but if not, maybe the first post can be edited to correct some info regarding drilling the bolt hole for the Fbody alternator bracket.

I used the first post to determine I needed to drill the blank bolt boss on the front of the block to accept a M12x1.50 bolt.... Or atleast that's how I interpreted it. I did so, and found that the Fbody accessories use M10x1.50 bolts after I already had it drilled and tapped for m12x1.50. Thankfully m12x1.50 is the size needed for a heli-coil kit to repair to M10x1.50 threads, and was able to fix it that way. Drilling the alternator and bracket to accept the m12 bolt would have left less material near the bolt than I would have been comfortable with.

25th327RS

iTrader: (2)

If I make a border-line questionable post, I get corrected quickly, as I should. Wonder why this incorrect I formation regarding drilling a hole into a ENGINE BLOCK can rest here without issue. I have contacted a moderator about this to no avail. Not trying to raise a stink for the fun of it, I legitimately just don't wan somebody else to make that mistake. Maybe I have rubbed somebody the wrong way and I have no merit here....?

cam-

Well I know its solid that you figured this out and wanted to share but as with anything in life if someone is not prepared to do their own diligence and notice the tap is much larger than the bolt they are about to use then I would imagine they probably asked for it. This is information shared on a public message board and when this post was first published this info was FRESH and much desired.

Have things changed since then? Much.

Have there been new discoveries and gremlins/fixes? Many

Is anyone getting their nose out of joint over it all? Few

Do any of us care if a V6 is lighter than an LS swap? No

Atilla the Fun

Passive-aggressive doesn't work in TGO. And the "error" got corrected later in the thread, plus who copies a mod without reading the entire thread? Many months since I had a set of those brackets in my hands, but I'd bet real cash that they could be drilled out to take the larger M12 fastener.

Brando5641

iTrader: (-1)

Right! lol

25th327RS

iTrader: (2)

I agree with you cam, if I had slowed down for two seconds, I would have seen it wasn't right. I understand the info was at the time new, I do fail to see a reason to knowingly leave incorrect info on the boards and not corrext though....? If nobody cares, then it is what it is

cam-

five7kid

iTrader: (14)

My apologies for not jumping right on that. Your message came at a bad time for me personally (travel, long work days), then I couldn't find it when I came on to correct it. Things have gotten busy again, and my TGO time has been limited.

I've now corrected the first post with your information. Hopefully that will keep anyone else from having that issue. I think I need to drill my 6.0 block (haven't gotten that far in my project), and I would have come here to get the info.

Thanks for your input, and again, my apologies for not responding more quickly.

zenish

did you use the trans that came with the 5.3 or the camaro trans?if the 5.3 trans did you use parts of the camaro trans to install it?

FIRECHICKEN

iTrader: (3)

Lets keep this party going......

Soooo Motor mounts!! There wasnt much info on that in the begining. Can I get Fbody mounts that will fit right on or do I need some sort of adapter to mount a 5.3 into my stock K framed Trans Am???

Getting my 02 5.3 next weekend.

wyatt86z28

Hey Guys,
Just wanted to say thanks for all the info! It is really helpful for a car newbie like me. I will hopefully be starting my swap in about 2 months as i have been nickel and diming all the necessary pieces to the puzzle. You all give people like me hope in doing an engine swap!

cosmick

The '99-'06 truck intake does fit under a stock base-Camaro hood, after a little trimming of the underside of the hood, and the top of the front half of the intake, using Trans-Dapt 4536 mount brackets on new stock 2.8 rubber mounts. It is extremely close, and may rub slightly when driving. The truck oilpan and truck oil tube can be modified to fit, with no loss of ground clearance, while still holding enough oil. See my thread: "Help choosing", for more detail.

MT Pockets

Just a quick question but would the truck intake work with a cowl induction hood?? Also just wondering if there is much work mating the LG4 harness to the truck harness when doing the 4.8 swap. Collecting all the parts I need right now as my car is in storage 2 hrs away.

cosmick

I've already fitted the truck intake under the stock flat V6 Camaro hood, no cowl needed. Fitting it under the louvered IROC-Z hood is proving more difficult, but I'm getting there. Can't speak to any version of stock Firebird hood variants, but it looks to me like they're less likely compatible.
The real difficulty is fitting the alternator, you must modify the truck bracket at a minimum, but there are pics here of that. The one I liked best was in a red car, but I didn't copy it. Trying to fit the alt on the truck bracket would require a hood with an extra wide rise, with a lot of rise to it toward the front of the rise.

weswisehart

Thanks for great info

rdsxfn524

when you say f-body, im assuming youre reffering to the 4th gen with the ls1?

alex722607

iTrader: (3)

Will the cam or crank have to be changed for a stock 5.3. What are the drawbacks to using the 5.3 stuff. I am installing this engine for reliability, get up and go, and fuel economy. So taking these into account can I plop the motor in and get what I want?

alex722607

iTrader: (3)

zenish

im assuming leaving the 5.3 stock will give the best gas mileage.or use a 4.8 for even better gas mileage.

alex722607

iTrader: (3)

Okay, thanks

flyitlikustolit

So I'm working on another 3rd gen, this time an 85 IROC. It has the louvred hood, and it will be getting a 5.3 and a 4L60E. I understand why the truck accessories are a pain, and why fbody accessories are preferred. what about A/C? what is everyone doing for A/C brackets and which compressor is the easiest to use? I was thinking I could use an 88 Camaro V8 compressor, as it has a serpentine pulley and is intended for passenger side mounting, and using ICT or LSSimple brackets. Will those work under the louvred hood? if not, will the Fbody A/C brackets work? or are they just like the trucks, mounted low and in the way of the K-member?