George, it isn't pulling 40 amps, because if it was, I would be replacing the fuse often lol. I have yet to hook up my ammeter on it, or stall the motor. And believe me, I did try lol. The wires off the batteries are 8 gauge, good for 40 amps,if not well more, and it never hurts to overkill wire size to keep voltage drop issues down.
Also, Thanks Doug for linking my video to this thread.
I just realized that you "Electric Springfield is chain drive" maybe that's what I should do with my Electric Massey as a problem of drive belt slippage has showed up.