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Since it was Free and the Right gear ratio in the 3rd member. hit the junk yards looking for a core rearend that the gears are shot in the 80-86 4x4 range cheap. That way if the gears in the Free 9" you got are good you'll have a good 3rd member to slide right into a good housing and axles. why 4x4 is because they use a wider leaf spring perch then a 2wd model. If i remember right the 2wds use a 3" wide sring and perch while the 4x4's use a 4" wide spring.i made sure it was a 9 inch before i got it. front carrier case and it matched up with every picture i could find. if the modifications are going to be too much then i'll find one that fits. which ever one i got i was going to overhaul anyway but this was free so i wanted to see if it would work.