You likely are on the wrong track with alternator/ charging problem, Steve. With a car an a "good battery" you should be able to disable the alternator and still drive the car........even with lights........at least 1/2hr to an hour. In the daytime a LONG time.
You likely have trouble in the bulkhead connector.........ammeter connections........ignition switch connections.......or cough gag.........the welded splice in the harness. You say, "no power" did you have anything at all? If not, then it's not the ignition switch.
