Wally,
I have a '52 3/4 ton with the original Huck brakes. I just picked up some '53 3/4
ton Bendix front brakes from a fellow bolter to replace my Hucks. Looks to me to be a simple bolt in swap. I haven't installed them yet, I have to do my king pins first. The Bendix fronts are also larger...12" dia. compared to the 11" Hucks. '53 to '55 should be a bolt in, maybe even to '59, but I'm not sure...my parts book only goes to '55.
