This was a good article as it explained the pitfalls with running all electrical power for lights, accessories, heater, A C, etc through the amp meter. Weak spot was definitely the firewall connector as the images illustrated overheated and melted wiring connectors. So you did the right thing and eliminated that "fire source" and frustration. I believe there are services that can convert a Chrysler amp meter into a volt meter and it will reside in the same opening in the instrument panel. You will maintain an original look and have a more modern gauge for monitoring the electrical system. This comment is interesting. Did you have to use a connecting ground wire between alternator and voltage regulator to get the system to charge the battery? You could have run a ground wire from the voltage regulator to the negative terminal at the battery to accomplish the same goal. As you do your continuity checks follow the positive battery cable to the terminal on the starter solenoid. Do you have exhaust headers on the engine? Is the positive battery cable and terminal on the starter too close to the headers???? Sometimes the close proximity can cause electrical problems. Disconnect the battery cable at the starter solenoid. Do a continuity check between the solenoid battery terminal and starter case. There should be no continuity. Just follow all the wiring that you replaced and / or reinstalled and check any short, small, identifiable segments. If you have a short to ground it will be easier to identify and isolate.