so I'm assuming that 168 is 12 volt late style like a 57 pickup. I would like to use the 57 12 volt style starter as I already have one and I will be using a 54 bell housing.

After I get this figured out I need to focus on the clutch plate and press plate. My flywheel had an 11" clutch and no way will I need that much clutch in the 31. But I do need the right parts to use my t5 trans.
thanks Jay D