Disc brake learning!!

Do you want to keep the 5x4" bolt pattern?

If not, the easiest way is to just get some 73+ spindles. You can get ball joint sleeves to re-use your small ball joint UCA's from Dr Diff and just get 73+ parts. Cheaper and easier than aftermarket, other than the spindles, caliper brackets and ball joint sleeves you can get everything from the local parts store. Or Cass, Dr. Diff has everything you need too.