I was wondering how difficult it is to swap over to a 350 TPI from my stock 305 TBI? My car is a 92 speed density motor. What all do I need besides engine, ecm, and harness? I swapped over my 89 Camaro with an 88 TPI out of a Trans Am and when it came to the wiring, i was lost. I ended up bringing it to my mechanic and he did it. I heard that the speed density motors are easier to do. is this true?