The last time I located a 6 to 12 switch it cost so much it was cheaper the convert to 12V, and I didn't have to find room for another battery. I remember the kind Zeke is talking about too. When batteries had the big lead connectors on top between the cells you could cut one and turn a 12v battery into two 6V batteries in one case. That was really a good solution,compact and easy. But batteries aren't made that way anymore. It used to make me laugh to see that my '38 Ford still had provisions for a crank and the lug wrench was also a crank. I never tried cranking the flathead with the 10 to 1 Offey heads but an 8V battery did OK using the methods above if the engine was not warm. I Parked on hills a lot! Not a good system for the Texas Panhandle! Although there is a hill between Canyon and Amarillo.
