The ODs came on 3 speed Saginaws and can be put on 4 speed Saginaws but that won't work on a column shift. The three speed Saginaws are pretty hard to find, at least I have a hard time. The 3 speed OD used before the Saginaw in the late '50s and early ''60s I think seem to be plentiful. The hardest part to find is the solenoid. They were often discarded when the fusible link inside failed by folks not knowing it could be repaired.
