"So for the million dollar question. Do I convert to 12v or is a properly maintained 12 the way to go" (did you mean 6?)
If it were mine I would look at it this way: (1) do I want it to be 6 volt original with the likely prospect that I will continually be faced with the frustrating problem of finding a generator voltage regulator that will work and last
(2)do I do the one time conversion to an alternator and enjoy the improved reliability that it provides
If you change to alternator and have a charge indicator light and not an ammeter, be sure and get a 3 wire Delco alternator. Loop #2 to output, #1 to charge light, BAT wire from old regulator to alternator output and you are ready to go. You will lose your charge light with a 1 wire alternator.