[Aarongriffey]

I changed my F1 to 12 volts because I often rent trailers. Now I don’t have to change the trailer bulbs to 6 volts, and then back again.
You don’t need a different wiring diagram. You can even use a 6 volt wiring harness. The 6 volt wires are larger than you’ll need for 12 volts.
You need a new 12 volt voltage regulator, the generator will work just fine, you can have the starter changed inside for 12 volts but you can leave just the way it is. I’ll spin the engine over a lot faster but may not last as long.
You will need a gage resistor to reduce the power going to the gages that most early Ford suppliers sell and of coarse you will need to change all the bulbs in the lights to new 12 volt bulbs. And a group 24 battery.
A better option is to not listen to those who say you should change to 12 volts. Especially if you have a radio and/or a heater.