I just pulled the trigger and bought this wire harness kit. I have an 81 but the harness is for 78-80. I put a new create motor and 5 speed tremec 600 in. I do not plan on using the computer so I figured this kit to work fine. My question is now did I make a mistake going with that kit as mine is an 81 and has anyone used this kit (tips, tricks and challenges?).