Hello Action,Ford also used a lot of varieties of shafts and joints. The variables are engine, transmission and sometimes rear axle.
I understand the different lengths of drive shafts based on transmissions. But I fail to understand why there was such a plethora of joints. I would think get the biggest joint needed for biggest amount of torque expected and giver every combo the same joint. Use the same ears on the shaft and be done with it.
Then build 10 million of them and you are good.
I don't get it either, and I can only speak for the 3rd gen full size Ford, but I had 3 propshafts from 352 and smaller engine cars and they use the smaller Cardan joints. I just tossed them as I only wanted the heavy duty parts of the 390 and larger engines came with.
Lots of things I notice on the 3rd gens don't make much sense, but Ford was probably too large to notice savings in different areas by consolidating part types.