In giving my beloved H a run threw the shop, I have decided to make a new basic wiring harness. Down the road I plan on doing a full restore at which time I will buy a recreation of a factory harness. Main reason I'm not buying one now is because the tractor is converted to 12 volt. When I restore, I have set in stone it is going back to 6 volt. Anyways my question is simple. Main power wire to the alternator, is 12 gauge heavy enough or should I go larger? I would think 12 is fine, but if 10 is better, I'd rather learn now then the hard way. I'm probably just splitting hairs here. The original wires I find hard to properly gauge as I'm not use to fabric covered wire.