Howdy everybody. I did a engine swap and then researched. Hopefully I don't forget and do it that way again. What I did was I put a fresh rebuilt 1993 454 TBI in a 1974 C30 dually. First time I did anything with a GM engine much less a throttle body. Theres a whole story how I got here and its not entirely my fault. Anyway, everything was going pretty smooth until I realized the ECM I bought with the engine wasn't original to it. Now I'm trying to figure what to do for a prom chip in a 1228747 ECM for the 454 in front of an ancient manual trans. I now realize there were better choices I could have made in doing this swap but here I am many hours and dollars later. This forum kept coming up in my searches for info so hoping for some sage advice.
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