I found a good deal at Brothers Truck Parts and order the disk brake kit on 10/23/12. Kit and bearings shipped for $543.00. I purchased the booster/MC kit on Ebay for $216 shipped.
As for the spindles, it is important that the inner bearing race will not spin on the spindle. It should be a snug fit. If loose, or the spindle is scored, JB weld can be used to build up and clean up with emory cloth. Or, the bearing can be installed with red locktight to ensure the race does not spin. The roller bearings do not ride on the spindle directly.
