The only size 1954 truck with any type of enclosed drive-shaft was the 31xx series (1/2 ton) trucks.
All larger 1954 Chevrolet trucks had fully open drive-shafts/lines.
There was one size 3/4 ton Chevrolet box in 1954.
There was one size 1/2 ton Chevrolet box in 1954.
There was one size 3/4 ton GMC box in 1954.
There were two sizes of 1/2 ton GMC boxes in 1954.
