Stove 51 and awk: There are more than one way to do this as you have guessed from the different threads.
1. Use a generator.
2. Use an alternator.
Some differences in the wiring for each application. Simply because the power sources are different. The basic things in common are the lights, and the need for drop resistors. The drop resistors help control the current flow through the fan motor and points. The resistor for the fuel gauge insures that you won't run too much current through it as well.
Alternator will be wired different because it has an internal rectifier. That converts AC to DC power. The Generator works only with DC so there are differences when you use one or the other. But the lights,fan and gauge are the same. The single wire alternator uses the same regulator just needs it hooked up to the plug that runs the field coils. No charging a "dead" battery with an alternator because it needs some voltage to excite the field coils. The Generator has a pair of permanent magnets that will develop voltage even if the battery is "dead"
So with all of that said, yes there are more than one way to convert from 6 volts to 12 volts. Mix in the issues of starter motors and you can get confused. Starters are matched to the flywheel. Use a 6 volt starter with a 6 volt flywheel and it will be fine. Keep a 12 volt starter with a 12 volt flywheel and it will be fine. You get to choose and have fun as you learn. Enjoy!
