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David, If youre gonna convert to 12 volts and want to use an alternator, I WOULD CHANGE OVER TO NEGATIVE GROUND cuz all but a few expensive specialty alternators require Negative ground... NOOOOO the 6 volt starter will work, Ive never had one go bad buttttt ttt avoid real long cranking periods and it can be a tad tougher on starter drives..... Of course, change any light bulbs over to 12 volts. As far as IGNITION CHANGES for converting from 6 to 12 volts, you must EITHER add a series voltage dropping (12 to 6) external Ballast Resistor in the primary ignition circuit after the ignition switch and before the coils input orrrrr rrrrr else get a replacement full true 12 volt rated coil, otherwise the 6 volt coil would get too hot n go bad plus the points will burn up prematurely. ALSO if you change the ground to negative, the coil leads need reversed so the + gets voltage from the switch/ballast and the - wires to the distributor ALSO if you change ground, the ammeter leads need swapped or else it will read bass ackwards I prefer the GM 10 SI Alternators (3 wire but configured for one wire operation) as they are readily available,,,,, ,low priced,,,,,and dont require any high PRM to excite nor is trickle discharge when setting long periods much of a problem versus some One Wire alternators. If you want my description or Bobs neat picture or Bob M's diageam of how to wire them, post back for instructions. ELECTRONIC IGNITION they are made for either + or - ground but I recomend you go - ground as an alternaotr is cheaper that way. If you use an electronic switch I HIGHLY RECOMMEND to get the most bang for the buck and to utilize all the advantages the elec switch has to offer, to couple/match it up with a high energy coil instead of just using the stock coil... Have the elec switch vendor match the coil for the switch and I would run a bit wider plug gap and use good quality plug wires n distributor cap n rotor. Best wishes n God Bless John T
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