According to several Ebay listings, the same 1/2 ton 11" Bendix brake drum with 6 lugs fits Chevy and GMC from 1951-70, front and rear. It might be worthwhile to source a used drum from a salvage yard and see how much modification would be needed to adapt it to a Huck brake.
Brakes, and a lot of other parts are "dumb"- - - -they don't know what kind of vehicle or year they're mounted on. As long as they can be made to fit, they'll work. Back in the 1970's Dad adapted a set of 1/2" wider brakes to the Rambler Ambassador he used to tow our camping trailer. It made a huge difference in stopping power with the heavy trailer hooked up.
Jerry
