rotorwrench
Well-known member
Keep in mind that during the change over in late 1935 that Ford wanted a way to ID if it had the "Large Bearing" crankshaft during line production. Engines were cast at the Rouge and at a foundry in Canada so there were plenty of possibilities of blocks that may have been replacements for parts inventory or what have you. The engine had another major change for 1937 when the new water pumps came on line so that was the end of the need for the LB ID. If Ford added a different way to ID then they could stop stamping them.
