Originally Posted by
pastorbobnlnh
I don't believe the cutouts on the cassette cog would present a problem when they could be modified for freewheel body use. There are enough splines on the Shimano/Sunrace type body to make up for any inexact spots.
Looks as if ebay has what I need to get started on this project.
RMT Pneumatic Knuckle Press. It's local pick up only in CA. Can anyone facilitate?

I think it would be better to build a freewheel/cassette adapter, then we could simply use cassettes.... Wouldn't help for 5 speed and 6 speed, although if you took a 7 speed apart you could build a 5 speed or 6 speed out of the parts.