I'm using 79-81 TA rear discs. Not the best choice due to ratchet rear calipers but work OK for me. Kept a '81 4 WD dual diaphragm booster and 1 1/8 '81 4 WD plastic reservoir master.
No off the shelf axles but Dutchman can do them if you order them. Be SURE the axles are 30 spline 10 bolt if using C clips vs 12 bolt 30 spline axles. C Clip button thicker on 12 bolts.