Anything you want regarding lights is very doable. Including using "original" park or tail lights with dual filament sockets/bulbs. It's all available in the aftermarket.
Replacing the ammeter wire is a bandaid, but will be OK until some other old shredded wire gets bumped around and etc. It's more troublesome on old vehicles with limited fusing. In your case, all the lights are fused and the headlight switch should have a fuse and thermal overload resetting breaker. It's just you never know, after all the previous owners, what is lurking.
There have been folks using 6V gen with 12V reg. The gen will run up to possibly 30 volts if not regulated or "run away"..... so they just let it go to 12V. Tractor guys and others have done it with no problem. Members here use their 6V starters on 12V. A motor is sort of the opposite of a generator but same type components. One drives, the other is driven. I've never done it and don't recommend a 6V gen with 12V reg. Was just mentioned as the third possibility.
I did buy a 46 CJ2a VEC with that setup and it worked for the previous owner for a long time, but I changed to alternator.
Last edited by bartamos; 01/05/2025 3:00 AM.