If you can tweak the rules a little, put an automatic trans behind your gas engine with a high stall converter. Maybe you could stalemate him long enough to burn the windings up in the electric motor. Seems like it might work even tho I can't say I have any experience to back up the claim. I would think the big block at a dead pull @ stall speed would last longer than an electric motor with 700 or whatever volts smokin' the windings.