Just bought an 89 350 tbi can i put everything from my 305 tpi system on this motor. Can i keep the three fifty heads or is it better to keep the 305 heads? Any computer changes? Any injector changes?

 

I would keep the 350 heads since the compression was a little higher on the late model 350. The swap shouldn't require any changes to the fuel injectors. It would run a little stronger with larger injectors but when you consider the cost and trouble it's not worth it unless you are trying to ring everylast horsepower out. I swapped my 85tpi to a 350 and it runs great.

 

thanks man i will take your advice im not looking for every last drop yet just want to get it back on the road bolt on can come later but thanks again

 

Completely different ECM's.

Completely different ECM's.

8 22lb injectors required for what is now a 350TPI vs 8 19lb injectors in a 305TPI.

Did I also mention that they have Completely different ECM's?

 

I didn't replace my ECM or injectors and mine runs great.

 

I just re-read.
He's re-using the intake and just changing the shortblock.

The injectors should still be changed. 19lb injectors on a 350 will most likely run lean.