The 1953 through 1955-1st series truck 235 water pumps would also have a 3/8" pulley, and is listed as the same for 53-54 cars.

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.