47-55.1 Battery charging issues

[dsraven]

also check your state of tune. plugs, cap, rotor, points, condenser, fuel filter, fuel age, carb and choke adjustments as well as what's in the float bowl, valve adjustments, compression readings dry and wet etc etc. if the engine cranks slow it may also flood easily and not be bringing the compression up to spec like a faster cranking engine might.
as mentioned earlier, maybe check the voltage regulator points as well. hitting it with 12v may not have been in it's best interest, so to say, as well as any other 6v items in the system. gauges, sending units etc.