ALL "Nail" distributors interchange. The drive gears are all the same size. Only exception is that '53-'55 had steel cams so the dizzy gears were steel. Later from '56-'66 cast cams were used & had cast gears. They CANNOT be interchanged. Although you could use a '57-'66 windowed dizzy in a '53-'55 if you changed the gear from the original earlier dizzy. Understand????
Tom T.