This should be a 12 volt system but I could be wrong. A lot of people had their 6 volt systems changed to 12 volt. It really doesn't matter which system cause they will look the same. One thing is the car will have a generator not an alternator. If its a generator it will look like a starter motor. On the conversions most people put in an alternator with an integral voltage regulator to minimize the wiring. Also 3 battery caps is a 6 volt and 6 caps is a 12 volt. Good Luck.