I have a 89 Firebird Formula with a 305 TBI in it. I am looking to put in a 69-80 (based of the block casting number) 2 bolt main 350 bored .30 over with a mild cam. This motor was originally carburated.

Now what I am wondering is what heads would be better for this motor swap (the 305 or 350 heads or other).

If the throttle body intake from the 305 would bolt up and work with the 350.

What injectors would be best? Would the Knock sensor and ESC module be different than the ones mentioned in the thread (How to: 305 To 350 swap... everything you need to know)?

I know that modifications would have to be made to the chip. Any information on what might need to be altered?

Anything else that anyone has to offer about this.

I appreciate any help that anyone has to give.

Jeramiah

 

The first step is to give us the casting numbers of the heads. You have to remove the valve covers to find the casting numbers. Don't buy anything until the heads issue is resolved.