Since no one else is chiming in, I'll give it a shot. If the axles are original, which may have been changed one or more times in the last 55 years, they should be Huck style. 52-53 is when the changed happened so you'll have to tear in to them to know for sure.
Good luck, parts are somewhat available for both,
Scott


Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!