Did a search and found lots of info on differences bet. 1/2 and 3/4 ton hubs, but I'm changing my ball joints next week and I'm going to put on some slotted rotors at the same time. Now, I want to have a set of hubs ready to go with the rotors pressed on already. I went to the junkyard and got some rotors/hubs from a 10 bolt with auto locking hubs, 'cause I thought I read here that the parts for the d44/10 bolt were the same from the backing plate on out, after searching I'm not so sure... So, are my 1973 D44 hubs interchangeable with the I-don't-know-what-year 10 bolt auto locking hubs? I have a MileMarker manual hub kit installed, will that swap over? Am I S.O.L. with my 10 bolt hubs I paid $40 for?