More 7-1/4" Madness

The diff pot and gears etc are interchangeable on both 7-1/4" axles.
What is different is the axle tube ends where the bearing retainers and back plates bolt on.

They are either 5 stud with a large bearing, or, 4 stud with a smaller bearing.

The only reason the axle shafts won't interchange, is, that the 5 stud axles (guessing all with 4x4.5 wheels stud circle) have a larger diameter bearing than the 4 stud axles (guessing, all with 5x4 bolt pattern)

In either case, length and spline count are the same......