Catalog shows:
Truck - 1954-55.1 Block casting #3701481 with Head casting #3701887.
Head casting #3701887 was also used in 1953 with block #3701946.
Passenger -1953-54 P.G. Hyd., 2 water pump holes, Block casting #3701481 with head casting #3835913.
Passenger -1954-55 Std. Trans., solids, 2 water pump holes, Block casting #3701481 with head casting #3835913.
Crank forging for all above was 3701488.
