Older 7.25's are a different animal, since the intro, they have been made in A-body LBP('73&up w/discs), F-M-J-body LBP, and Dakota rear LBP & Early Dak 4×4 Front diff's.
Very early units even had different pinion splines & ring gear screws. There were changes to carriers, bearings, axles/retention, so yes, RRR's early-A diff is not the same as an '80's Dak....which is probably the only reason any new 7.25" parts exist at this point.
