The Stovebolt Site Forums The Shop Area The Electrical Bay how do I know if it's still 6v or 12v?

I have not put a battery in it. The motor turns by hand. But I took the plugs out and there were #47 & 48 ac delco. There looks to be newer wires going from the ignition out to the starter and a ground wire I believe. The motor is not the original 51 216. Its a 54 motor.
Thank you.