One-ton stuff little harder to find than smaller parts. If you can get part number, I may have a king pin kit that would fit. I got three diff kits when I did my 50 till I broke down and got right one. Chevy Duty has lots of the big truck wheel cylinders. On the press, sounds good, not hard to pull whole axle out of truck, specially with front off. New u-bolts, spring pins and shackles are cheaper at a spring shop locally if you have one nearby. Brake shoes can be re-lined with your old cores if not down to metal. Just a good lubing of orig parts may make a difference if it hasn't been done in long time. On the dually, if you don't have the deep dish type wheels, it won't be a dually. The fronts have a big "spacer" like item on the drum to set studs way out so you can use the deep dish wheel backwards there. You can get deep wheels and put on back if the studs are long enough and inner wheel clears the frame and springs. They will be close there, and also should not rub tires to each other. Seems about that year, they had 19.5" one-pce wheels, as that's what I got to put on my 50 recently to rid my self of the odd 18". I would also try some 16" newer wheels to see if they go over the rear drum. They didn't on my 50, but it had OS brakes for it's year. That way, tires are easy to find in all diff widths.
