I've decided to investigate whether late model wheel hubs can be fitted to the original spindles with an adapter. My neighbor showed me the "kit" that allows modern hubs (with discs) to be fitted to his Ford. Essentially just stepped bushings that slide over the spindle and set the proper ID's and distances for the bearings on a late model hub. All I need now is the time to go scavenge some late model hubs from a wrecker and see which ones could be made to fit. The Plymouth spindle is very long and small diameter, so I think it should be possible.

I know I'm in the minority here, but I like the look of the original cast "I-Beam" axle versus a tube.