my friend has an 83 pontiac (i think bonneville) boat 4 door! my dad says he thinks it may have a 301 in it were not sur but, my 91rs has a blown 3.1l in it right now. i have a 350 block that dad and i are going to build a 355 but,right now how hard would it take to temporarily put the pontiac v8 in my rs ?

 

Its alot of work to swap a V6 for a Chevy V8. Its even more work to swap in a Pontiac V8. Don't waste your time.

 

Welcome to another father/son team!

It would be hard enough that you wouldn't want to do it temporarily, unless the permanent is another Poncho that would bolt in the 301's place.

 

ok! i know i would have to use the tranny bolted to it, and have a new driveline built ( i know a place in wichita ks that for $40 will make adriveline to your specs) but can i use the motor mounts in the old pontiac car? also wouldn't i tbe the same as putting a pontiac v8 into a firebird? i have heard and read about it! i just need my camaro back on the road!! also my dad really wants to do it he loves the power one of these v8's have!!!

 

I know it's a lot to read, but it's covered here https://www.thirdgen.org/techbb2/sho...hreadid=291473

 

i just found out its pontiac bonneville 307 how are these motors? friend says it runs great except it needs a carb(i've got a 600 eddie to put on it)

 

im a pontiac engine fan...but as much as i hate to say it your chevy engine would be a better swap mainly because the pontiac engines after 79 were really short on hp unless you can find a 301 turbo...and i dont think pontiac made a 307 maby that is a buick or an olds engine....if the oil filler tube is in the front it is an olds engine for sure...hope this helps.....build the 350 it'll be cheaper

 

oh yeah the 350 is definitely getting built!!! but, right now i need something and can't find a v6 replacement cheap and my buddy is pretty much giving me the engine!!! i'm not sure about the engine all i know is what he told me i'll get my dad to go and look at it with me tomorrow!! i would put the 350 in right away but i have to send it to the machine shop, get a new crank, put it all together, you know the drill TOTALLY FUN! but its taking way too much time and dad says we can do this fOR A QUICK FIX ! that way i can concentrate on my new 355!! we get kinda bored out here in oklahoma! nothing but hills beer and sometimes girls!!!! lol

p.s. you guys are a great!! by the way thanks i love this site

 

It's NOT a quick fix,it WON'T gain you anything.By the time you get this thing in and running,plus drop cash on driveshaft work and exhaust that you won't be using,you could have the 355 in & out of the machine shop,built,and dropped in,ready to run.

You've got your answer,stop looking for approval from people that know better,it's just not a good idea.Don't mean to be rude,it's just that your question is answered,but you keep grasping for straws.

Get the block to the machine shop,and devote your spare time to beer and girls in the meantime.

 

The 307 is an Olds engine. It wouldn't be temporary, it would be a swap unto itself. Same for a 301 if the final engine is a 350 Chevy.

For "temporary", to get on the road, to keep insurance down, go find another 3.1 for now.

 

awsome !!!! great !!!! thanks i'll end this conversation NOW!!!!!!!!!!!!!

 

i've been looking for a 3.1 even a 2.8 for a while now i thought this might be a fair idea! now i know you all's oppinion(including irockz) i'll leave it at this thanks

 

Check the Classifieds on this Board. You can probably get a 3.1 just for picking it up.

I sure hope you've read the V6 to V8 sticky. You've got a lot more than rebuilding a 350 block ahead of you.

I picked up my car as a $200 rebuildable - cracked 2.8 block, didn't run. I was looking around for a replacement engine, a place that "specialized" in Camaros told me to forget about putting in a V8, it wasn't worth it. They told me about a guy that parts out insurance auction cars, who had an '86 V6 'Bird with a good engine. When I went to look at it, he wanted $400 for just the engine, or $800 for the whole car. Then he said, "You look like someone who would rather have a V8. I've got this car over here with a 305, same deal."

I didn't know about this Board at the time, so I set off on the project on my own. Took me a couple of months, but while I was cleaning up the 305/TH700 getting them ready to install in the driver, a neighbor drove up with the '87 TPI 350 Formula he had just picked up for $950. I had more in parts that didn't yet run than he had in what he was driving.

Weigh your options carefully. Sometimes the one you have your heart set on isn't the best one available.

 

yeah its gonna be hard for me thats why i'm having my dad help he's transplanted engines into everything from a v8 into a toyota truck to a big block ford into a late model mustang!! i think it'll be a fun project i just wanted oppinions on the pontiac engine!!! i talked to dad and he says that the older v8's had alot of torque but the 80's models he wasn't sure but he thought weren't as powerful! i have a 700r4 for a v8 so i think i'll build the 355 and start the tranplant of the 355!

 

Good luck and have fun. Dad's remembering "the good ol' days", and things really were different (that's how I got into my pickle, because "the good ol' days" were all I knew at the time).

Sorry if we came off sounding harsh, we're just trying to help you avoid the mistakes we've all made.

 

and i appreciate it! this isn't the 1st third gen. i've owned. i used to have an 86 iroc that i rebuilt and, my cousin has a 92 with a v6 that we've worked on quite a bit so with dad know how. and my little bit of camaro's i think it'll be a great project! i'll keep yall informed! after the 355 is in i would like to study up on putting tpi on it but thats another story(or thread)!

by the way pa wants me to ask if anyone has put an Lt1 out of a caprice into a third before?

 

the cool part about this project is that i'm 30 yrs old and dad's close to 65!

 

just found out i might have a set of 882 corvette heads!!! i'll have to have them checked out and a valve job done but hey there 883's how cool is that!!!!

 

I believe several members have used the B-body LT1s. Check that sub forum at the top of the Engine Swap forum. If memory serves, the accessories cause problems (Vette accessories seem to work best in 3rd gens).

Uh, 882's are pretty poor heads, even if they once lived on a Vette. You can do better.

 

I'm with Five7... I wouldn't put much into those heads, wether they came off a Corvette or not. Those heads also came in trucks, station wagons, and basically anything else with a 350.

The problem with them, is that they have quite poor flowing ports that take ALOT of reworking to get decent flow, they have large 76cc combustion chambers (meaning low compression) that have a poor design that causes detonation very easily. They are also a 'thin' casting, so it cracks and warps easily.

If you want to use GM heads, what I would suggest you do is find a set of non-TBI 305 heads. The casting numbers will be 416, 601, or 081. These are great heads to use on a 350 because they are a heavy casting (very durable), they have small 58cc combustion chambers which makes for a very good compression ratio, and they flow very well for a stock GM head, and porting can help even more.

The other option would be to hunt down a set of 113 aluminum Corvette heads. These came on the late-80s Corvette TPI motors. They are basically the same specs as trhe 305 heads described above, except they are aluminum. They also have angled spark plugs, which makes for a little bit more power and makes them easier to get out later.

 

how hard is it to find double hump heads?

 

They are getting pretty difficult to find, especially for a reasonable price, but compared to whats out there now double humps are really nothing special. In reality, they are just about the same as the cast iron 305 heads I mentioned before, as far as performance goes.

The reason they were so popular 'way back when' was because they were the best performance production heads one could get. Aftermarket heads, at the time, were never really an option for most people because they were so expensive.

But things have changed. Now, for what a quality rebuild would cost on a set of double humps, plus the cost of the heads themselves, you can get a MUCH better set of aftermarket heads, either in cast iron or aluminum. A good set of aftermarket heads, like those from Dart, TrickFlow, AFR, and many others are sooooo much better in every way than any production head GM made at any point in history. And they really aren't any more costly than most people think, all said and done, compared to rebuilding a set of junkyard heads (heads, new parts, cleaning, machinework, etc).