Hal, no doubt the engine is a 216 made in 1952. If the serial number ends up being "KAM" its a truck engine. It wasn't uncommon to have a previous year's casting number on an early model year engine. The block was cast in 1951 and assembled in 1952 thus receiving this model year's serial number. The engine should have a big circled 51 embossed on the side of the block. My dad's 1949 216 is the original for the car and has a 1949 serial number and a big circled 48 embossed on the block.
