72 Duster Resurrection

Being its hardened steel, the wear on the races on the hub against smooth new rollers could cause the rollers to slide instead of roll, then you got a whole new set of problems. Or at the very least you will get premature wear on the new ones. If you have to change any of the bearings, the new one comes with a new outer race. You should knock the old outer race out of the hub for the bearing your replacing, and press in the new outer race that comes with the new bearing. Clean em up and inspect. If theres chipping or spalling you will know it. The rollers wont be smooth and shiny with small wear lines in them.