how difficult is it to put a 305 out of an iroc into a s-10 that had a 4.3. obviously the are some ramifications with the computer but can you just change the computer, or chip it to compensate for the 8 cylinders versurs 6 let me know what yall think...........thanks!!!!!!!!!!!

 

you need v8 motor mounts specifically designed for the s10 (summit and jegs has em), specially designed headers, a rear, and some other small stuff. its a fairly big project.

check www.blazinlow.com, they do a LOT of those kind of swaps over there.

 

Also, just a thought, there is quite a good aftermarket already for the 4.3L so with some bolt ons or even a full rebuild with cams and reworked heads I'm sure can push you well beyond the output of a 305 motor with alot less hassle.

 

yeah, but you still have fairly low hp compared to a V8 with the same $ into it(not a 305, but still..)


look here
http://www.s10forum.com/forum/forumdisplay.php?f=10


http://www.s10forum.com/forum/

 

offhand, i do remember, i had a 4.3L s10, and i raced my friends 91 Formula with a 305 in it, and i beat him by like 3 cars. So i wouldnt drop a 305 in, youll get the v8 sound, but v6 performance. go for the 350, dont do it half assed.

 

Also depends on if the 305 was tuned port or throttle body. The tpi's smoked the tbi's so im assuming you raced a 305 tbi. But I agree that if you are going to do, you might as well do it right and drop the 350 in it. It's pretty common around here to see 350's in s-10's so i'm assuming it's not extremely hard to do.

 

yea, his was a TBI, but my s-10 was also a TBI 4.3L, not the TPI.

I know what you mean tho.

 

The 305 is not really a good engine for performance applications, you'd be a lot better off to go with the 350, it just seems like a lot of work to end up with the lackluster performance of a 305 IMO. The cheapest and easiest way to do it would be with a carbureted small block so you cuold eliminate the PCM and wiring harness, but the best way in my opinion would be to go with a later model fuel injected small block (L98,LT1, or LS1)

 

I've looked at this site for quite some time with interest.

They have everything a person needs to do a V8 conversion.

On a side note...........for all the trouble it's worth - I'd throw in a 350 rather than a torqueless wonder 305.

 

PandaMonkey has got it. JTR is the premier company that deals with those kind of conversions. I JUST sold my JTR S-10 V8 swap manual online to someone for like $10, its ashame, you could have used it. Id suggest picking one up, it was like 17 chapters step by step on how to do it. Well worth the $30 or whatever it costs.