Want disc brakes, what to do?

There should be plenty of donor cars here in Texas once you decide what you want to do.

I would suggest upgrading the front to the BBP disc setup (Spindles, upper control arms, etc) then just buy a whole 8.25 working axle and roll that under your car. Better rear axle, bigger drums, BBP wheels, and should be pretty cheap. Plus you can easily upgrade to a Jeep Grand Cherokee rear disc brake setup later if you like.