68 Barracuda Formula S 340 car Charging

Sweet ride Rusty. You probably already know that bad grounds are the bane of most of our electrical problems with these cars. I ran a short ground wire from the back of my alternator, there should be a grounding post, to the block. I also ran a ground wire directly from my negative battery post to the body then to the voltage regulator and to the block to ensure good grounds. These need to have clean metal to give a proper ground. I'm not sure about the old style voltage regulator but the newer style flat regulators must have a good ground from the case to the body. The voltage regulator voltage setting is 14.3 volts. Autozone should be able to test the alternator you have if you think it's suspect. Someone else will jump in to explain much better than I can. Hope this helps some. Good luck.