If you have the original 6v Hydra-Matic starter, you could try to use it with a 12v electrical system (you might need to change the solenoid?).
I think the Hydra-Matic 6v starter had other differences from the normal 6v starter (maybe having to do with the "snout" and/or how far the gear is pushed towards the flywheel).
Doe anyone know how many teeth are on the 54 Hydra-Matic flywheel.
