Just another k.h. Swap thread.

The lower control arms are the same between drum and disc brakes, but, the disc brake lower ball joint has bigger diameter mounting holes. If you have a good enough drill, you can just open them up for the bigger (9/16" I believe) bolts. If your ball joints have any play in them, I'd just get new ones. The stock wheel bearings are Set#2 (outer) and Set#6 (inner). Get new seals while you're at it. Try to get the factory ball joint to spindle bolts if you can. Otherwise, make sure you get some good quality grade 8 bolts with locking nuts to match.