I bought a 1989 Iroc with a knocking 350 tpi motor.So I bought a used engine from a local junkyard.They are the only junkyard that offer a warranty on a used engine. The engine(TBI 350) was out of a 1991 chevy truck(Z71).That showed 200000 on odometer or so the paper work states.I planed on using the TPI heads on this engine.The junkyard said that might void the warranty so.I bought it for 425.00 no warranty.I got it to the house and put it on the engine stand and covered it up untill after Christmas.It had a TBI intake and throttle body on it and Distributor too.My oldest son wanted the TBI stuff and heads.He helped me strip them off.My son pointed out the big harmonic balancer (with a cut out) and said it looked like a 400 small block.I looked at the stamp at the back of the block it had a 5.7L on it.The flex plate had a big weight on it also.So we pulled the oil pan and googled the crank cast number... 1970's 400 small block chevy.A 383 chevy!!!!Closer inspection showed a 2 piece rear seal crank in this one piece block.It must have some kind of adapter.The engine is supper clean and you can see .030 on all the pistons.

My boys think I should switch this out with a TBI 350 I have in a 1967 chevelle,but the 67 runs too good to mess with.My question would this engine work in the 350 Iroc without a chip swap or other mods(bigger Radiator or injectors) ? The Iroc has shortie headers and a flowmaster everything else appears oem...

 

Radiator will be fine. You will need larger injectors and a tune though.

 

Now is a good time to put a cam, heads and Holley Stealth Ram.

 

Yea I was thinking about a roller cam...ok so 24 lbs injectors and a tune?

 

30lbs with the right cam heads intake

 

Not much room when it comes to a big cam in this thing.Connecting rod is close to a lobe.

 

Run a small base circle cam and that will help with lobe to rod clearance

 

24# is kind of low. My buddy was running 39# SVO injectors in his 383. I think his cam specs were 236/236 .600 .600 107 lsa.

 

Toss on some Nice heads. mild cam and HSR

 

Pardon my ignorance but what is a HSR?

 

Did you measure the stroke?

 

Holley Stealth Ram

 

Oh,Holley Stealth Ram.thanks

no have not measured stoke