I took the 305 TPI out of my 90 Camaro IROC-Z for a 350 crate that matched up for my year ,and it went great, but it runs like crap. It's the computer I think. I used the fuel injection manifold from the 305, but I used the 350 injectors. I had a guy try to reprogram the computer, but not much of a diffrence. I still had to keep my foot on the gas to keep it running. If I get an orginal computer for an IROC that had a 350 and bring that to the guy and have him tune it for the cam I have, will that work better?

Thanks for any help!!!

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90 Camaro IROC-Z28