A couple months ago I bought a 1950 1/2 ton. When I bought it I asked the guy if it had any 12v conversion and he said that it had a 12v starter. I assumed that it was converted. After I got it home it has issues starting, if it doesnt start right off then the battery drains. But with a jump it runs like a champ. After looking I noticed that it had a 6v battery. Looking further it actually has 2 batteries, they put in an additional battery tray in behind the original one. It has a 12v battery with a solenoid that connects the 2 batteries together. There is also a starter button in addition to the starter pedal. Is this common? Can I just convert it to 12v easily? How do I know what has been converted to 12v already?