Did the search, no luck. Swapping a 55.1 rear end into a 53 1/2 ton. Though the spring pack seems to be a direct bolt-in the emergency brake hookup surely is not. A lot of differences between 55.1 and 53 including the way the ebrake cables attach to the backing plates, the backing plates and the length of the ebrake cables. Anyone who had done this swap have any guidance? The direction I'm heading is to source a couple of good 55.1 cables (mine were cut by someone else when they removed the 55.1 rear end)and modify them so they will fit the 53 e brake where the rod goes across behind the cab. I will have to have cables cut and threaded rod swedged onto cable and get the clevis and pin that attach to the rod that goes across from left to right. Good idea or is there some better way to do it?
Jerry