I agree with all of the above. 12 volts wont hurt your engine and it will help when it is really cold but 6 volts will work bettet than a lot of people think. I converted my old tractor to 12 volts but it still was'nt great about starting.I have left my 54 gmc one ton 6 volts just because I didn'nt want to fool with changing everything.e.g. lights, gauges,etc. If you do the change you can get by with out changing the starter.It will work a long time on 12 volts. Just dont crank it till it gets hot.As above the cables on 6 volts need to be the big ones and the grounds need to be really good. Battery to engine, engine to frame,frame to body etc.
