65 Barracuda electronic ignition, orange box, ballast resistor questions

Get an FSM from a 65 and a 72 and compare ignition/Starter circuits. The ECU plug only goes on one way so your good there. There is no in-out on the ballast resistor but the plugs should only go in one way as the 2 ballast resistors are different values and the plugs are keyed so they 'face' each other. the wire length is the clue. As for the starter. There should be a hot to the starter solenoid/relay and then a large gauge to the starter as well as a trigger line from the ignition switch, starting circuit did not change over time.