I hesitate to say I converted to 12v because I never ran the truck with 6v. I did a frame up restoration and saw no reason not to use 12v. Since the battery is under the passenger floor there isn't really any way to tell it isn't 6v. All the necessary parts were readily available. I retained the 6v starter and the truck fires instantly. The lights are bright. I had enough slow cranking and hard starting with 6v vehicles in my youth. Granted, with new components and good electrical connections 6v will function okay. For me I can see advantages and no disadvantage to using 12v.
