Casting 3704482 was used from 1954-59 on the 1-1/2 ton and 1954-55 on 2-ton, BUT the flange for the wheel center hole could be 4-3/4" or 5-1/4".
The part number for the 4-3/4" flanged hub is 3704489.
The part number for the 5-1/4" flanged hub is 3704482.
Mike B

Edit...this is based on my US Parts Books...