Hi Harry,
   Hey, thanks for Saturday...everything turned out well (except the weather, of course!)
   
   About the museum's 70...did you say that all I would need to do in order to use a 12 volt battery in the tractor is to change that ballast resistor and get a 12-volt coil?
    Just wanted to check, because I'm leaning in that direction.

    Also, would I need to invest in a trickle charger, because wouldn't the 6-volt generator discharge the battery?  How long would it take to discharge a 12-volt battery?(best guess)

Thanks Harry
Travis