I am taking the motor (TBI 350) and tranny (700R4) out of a 92 Chevy P/U C1500. I am going to be swapping it into a 73 Blazer 2wd. I want to keep the a/c and all of the creature features out of the 92. I have the entire front clip out and I took out the headlight, turn signal, and horn wire harness. I need to pull the engine and the tranny. When I start gutting the inside harness, how much do I need to keep? Is there an aftermarket kit I can buy and put into the 73, or is it easier to make the 92 work in it? Thanks for any help.