Sounds like the rear brakes are early Huck and the fronts are later Bendix. The fronts are the right ones for that truck,where the rear end came from is anyone's guess.If there is someone in the area with a 52 to 55 1st you could look at the rear and see how it should be.Start looking for a rear end from a 52 to 55 1st and you should be OK.Look at the Parts for sale here.
Pete
