Dating back to 1933, Dodge’s flathead-sixes were legendary for their durability. Other than industrial use, the Power Wagon may have been the last civilian American truck to use a flathead (a.k.a. L-head) engine. This block is from a ’54 Dodge car. Dodge car power outputs were usually ahead of the trucks but the ’54 car output matches the ’56 truck output exactly. The main differences were internal. The trucks had more durable pistons and rings, alloy exhaust valves, and hardened valve seats, all heavy-duty items needed for hard work.