1/2 ton rears disc brakes?

[71'tahoe]

Hey guys,
Hope some one can help me out a lil bit. I have a 77' 4wd with a truck 12 bolt. I would like to do a disc brake conversion on the rear. I have built 3/4 and 1 ton 4x4's in the past and used the caliper brackets from blue torch and pioson spider and used the front rotors and cailpers. So my question is how do you do the 1/2 ton trucks. I know being that the 3/4-1 ton trucks used full floating 14 bolt rears as the same with the dana 60/70's. I dont need a parking brake assembly unless it is a swap from a newer truck. I have used the residual valves from wilwood in the pastwith good luck. I just need to know about the brackets and rotors Thanks for any help ya'll can give me.