This is what i have done so far i bought the dash then bought the 70 ss wire harness so it would match i exchanged 71 parts for 70 parts then i mounted it to the the car i wired the dash up before i put the dash in the car. I then put the dash in i wired the coulum up and hocked up the vacum lines i have one more set to go then it is complete..... The problem is how do i now if i did not put wires on backword such as the the brake light senor the hock can go on either way also any other advice would be helpful thanks