Engine wiring

That vehicle would have had points. So all you need to do it follow the wire that went from the + side of the coil back to the bulkhead and cut the resistance wire out. Then run your own standard type wire. The wire will look different than all the others. The resistance wire has a cloth type covering. GM ran the resistance wire all the way through the harness to drop the voltage at the coil so the points and coil didn't burnt up. There may have been two wires on the + side of the coil. The second came from the starter solenoid. Sometimes both wires were together in one connector on the coil. As long as the wire you run stays hot with the key in the run and start positions you are good to go.