Anything can be done for a price, but I think it'd be easier to find a good or rebuilt 6V generator. A 12 volt gen shouldn't be used w a 6 volt system. While I haven't tried this, I believe you're going to fry bulbs, your fuel guage, and maybe even your battery. As far as the amps-converting to a 12V system-the amp flow will be half that of the old 6 volt system. If you're wiring harness is in good shape (insulation not cracking or frayed) it would be fine to use with the higher voltage system. One of the problems with double filament bulbs, is that some of the 6 volt fixtures use a bulb with the two base prongs on the lamp directly opposite of each other rather than at the staggered height of the 12v counterparts. On my 36 Plymouth, I just ground off one of the prongs, and made sure I had the bulb installed so that the brighter filament was for the brakelight, and the dimmer filament for tail lamps. Mike