rear disc brakes ?
 

well time to redo the rear brakes on my pile what does it take to convert to rear disc on 4x4 12 bolt rear end ???

Some brackets from Speedway Motors, a couple of 75 Camero front calipers, a couple of axle hats and rotors from said company, a good welder, lots of patience. And a brake master and prop valve from mid 70's Corvette. You wont have parking brake, but I plan on using a line lock to lock the rear wheels up. Im in the process of doing this project right now. Will post pics when its finished.

I did mine about 1 tear ago.I got a 71 Blazer 4x4 with a 12 bolt in the rear.
Got the brackets and rotors from TSM.
http://www.tsmmfg.com/
Master cylinder from a 78 Corvette
rear disk brakes from a 84 Caddilac Eldorado
I was able to modify the Eldorado rear disk braket that holds the e-brake return spring and make my orig. Blazer e-brake work.

http://www.imagestation.com/picture/...f/fdac0b09.jpg

http://www.imagestation.com/picture/...a/fdab504a.jpg

You can see all the pic's here

I'm pretty sure I saw a conversion kit in Chev Duty's catalogue. Pricey, but might save a bunch of time converting things.