Been fighting this for some time. Had generator rebuilt by local guy. Had it back a couple of times and it is working. Regulator died. Replaced it with one form local Car Quest store. It worked for a while. Got one from Rock Auto. It didn't work. Got replacement from Rock Auto. It didn't work. Got a US made one from EBAY. It works. Almost wants me to go to an alternator but not quite yet. Learned a lot about how to test the generator on the car. Shop manual and an ammeter helped a lot. Generator putting out 30 amps and red light goes out. All is well. If old cars were easy it would take all the fun out of it.