[AZKen]

I don't know if the original wiring on the coil was correct and need to see how the owner had it so we don't blow the new unit. On coil positive, you had a red pertronix wire, a yellow wire and a probable resistance wire. This is not per wiring diagram for 1965 and is not the way it would be done to use the resistance wire for pertronix. so..........the important thing is to tell me where the yellow and res wires went. You said firewall. Need more specific with pics if possible. Once I see all that, I can help you wire the new unit.