Ok I got a couple axles from the junk yard, switch the locker for the 14 bolt 10.5”, then switch the drums the ones from the yard came with the 11” I had the 13” so I figured I needed all the help stopping, so why not. well it took me a couple trips to autozone till I just brought one of the drums in back plate and all. Well we matched up parts (wheel cylinders, springs, hardware and shoes the shoes we had to uses shoes off a 79 3/4 . and the rest we had to use off a 79 1 ton. Why is this what could this axle come off of?