I have an 85 Iroc-Z it has a 305, the motor is getting tired and I have a mid 80's 350 (going to run the #'s) it is a passenger side oil tube. Im trying to verify what parts will need to be swapped out. I am keeping the fuel Injected TPI I know of the following so far Injectors for a 350 Computer and/or chip Knock sensor and/or module (what exactly is this thing ?) I know the oil pan may fit off the 305 (the 350 is from my 85 S-10 Blazer that is another project conversion, it has a special deep sump oil pump & pan) will the flex plate from the 305 fit on the 350 & work ? if not what do I need ? anything else ?

You can probably get along just fine with the 305 injectors and computer/chip, if the cam is reasonably mild. I'd recommend an adjustable fuel pressure regulator, though.

If the 350 is '86-later, then you might need a different flex plate. Other than that, it should bolt in and run.

How well it will run with the '85 TPI system is another question. From what I understand, that wasn't the most sophisticated system. Exhaust, runner length, etc., may also hamper the 350 performance. Porting the base & plenum while it's apart might be a good idea.

does anybody know if the computer has to be replaced or is it just a chip inside that needs it ? & what or wohere would be a good place to get it/them ?