alpaca11,
I guess I don't understand. A typical light configuration on the rear would be tail, stop and turn. The assembly is grounded either through its housing, or a separate ground to frame.
This leaves tail, stop and turn. TAIL is a single wire from cab to rear. STOP is a single separate wire to left side and to right side.
TURN is achieved through a flasher in the cab and is directed through the same STOP wires.
If the '80 column wiring has more wires, can they be combined or taped off. I put a '76 Nova column in a '51 and don't remember needing anything out of the ordinary.
Am I missing the boat here.
Stuart