I was under the impression that the 8 1/4 also used a 3" tube. Is this not true? I do know that the 7 1/4 uses a smaller tube, u bolt spacing and shock plate.
I believe this to be correct as well. I went from an 8 1/4 to a strange S60 which is essentially a Dana 60 and did not change my shock plates. I did buy new u bolts.
