Hello I know this is not a 4x4 gm but I would need some information I can not find anywhere. I have a 93 g20 van 305 tbi 4L60E. I want to put a 4l80e that comes from a 94 g30 van 350 tbi. I need to know if I make changes to the wiring harness and I place all the good wires in the right place on my van 305 tbi 93 to operate the 4l80e on my 305 engine if I need to reprogram the computer? I also have in my inventory of parts a computer who comes from g30 93 350 tbi. Should I put that computer on my van 93 305 to start the 4l80e?