i have a 82 z28 with cross fire injection. im debating on putting a tune port 305 from a 91 firebird in. my question is do i have to change the harness in the car body. i know ill have to change the pump in the tank. i have the complete harness under hood and interior, along with the gas tank with fuel lines. im want to make it as easy as possible. if anyone can help i would be greatly appreciative. thanks del.