Make a long story short I have a 58 Ford and the charging system worked fine but when I rebuilt the engine I also had the generator professionally rebuilt by a qualified shop and installed a new voltage regulator along with all new wires. And it worked perfect...sometimes. It will charge perfect for a couple days than quit for a couple days then charge again than stop again and so on. So I took generator back to the shop where they tested it 4 times and it would not fail on their test machine. Any idea what would cause this??? I really wanna keep the car original but am getting very aggravated cause I never know when its gonna decide to stop charging.