The side mount provision you can see on the side of the engine were used from 1952-54 only on passenger cars. Though they were not used to mount the engine in trucks, the mounting bosses were still there on 1952-55 first series trucks.
It also has the early high mount water pump.
Not that I matters, but it is not the original engine.
Btw, the hood is a 1957-58 design.
You are right, sir. The engine block numbers show that it's a '52 216 (if I'm reading them right).