i have a 87 tbi system in the truck now with all 87 parts. was c10 donor truck with 350 auto 700r4 and non a/c . i have a few computers from 93 and 94 g30 1ton vans with 350 and 4l80-e in them. worked when pulled. i also have a stand alone harnness with custom burnt chip from a place years ago that let me run this with 4l80-e via piggy backing few signals from stock tbi. so basicly you get 2 computers in the vehicle . i am looking to redo the setup and there was someone here that does update harnneses or modifyed stock harnness. if i got the harnness out of the truck fro tbi and the stand alone unit and newer than 7747 computer is there a cost effective way to make it all one and work for my needs ?