[mrolds88]

On 1/2 ton to 1/2 ton 73-87/91 will swap. However there is a caveat. From 73 to 80 ish uses one style of parking brake cable setup and the later uses another. I am pretty sure (and if I'm wrong I will get corrected) you should easily swap your brakes onto any 10 or 12 bolt you find. Now There are differences between the 1/2 ton 2wd and 4wd rears. Most notably the axles (6 lug vs 5 lug) As for the housings I cannot say one way or the other. But there are so many around to choose from. There are also 2 versions of the 10 bolt. One has 28 spline axles, they were from late 70s to 87 or 88 then they went to the 30 spline units. Only place you'll find them is under a Burb or Blazer. Confused yet?