I'm thinking about helping out the cranking on my 50 Pontiac..I've never done this before..I have a few ideas...1...add a 12 volt battery(charged regularly) and hook it to the starter only and retain the 6 volt battery and charging for the rest of the car...2...add a 12 volt alternator and figure out what kind of resistor I can use to power up the rest of the car... Are the old Mopar ballast resistors good enough to pull the deal off or is there something better out there????....Opinions please....