A '55 1rst will be 6 volt originally, trucks and the 6 cylinder Corvettes from '55 were the last 6 volt vehicles from Chevrolet. It certanly sounds as if you have a charging problem. you should first confirm that it's a 12 volt generator, it should say on the tag on the housing. Then check it with an ammeter to rule out a faulty dash guage. You should also check the volts output. If you are going to convert to an alternator anyway,you'll want to go through the entire system and make certain that it's compatible with 12 volts.


Bill Burmeister