A 1948 216 that I'm working on currently also has that stamped number under the valve lifter cover, on the machined surface where the sheet metal cover bolts on, near the front of the engine. I was surprised to find it there during disassembly of the engine. It's in much larger letters/numbers that the one at the distributor location, and it's much easier to read. Has anyone else found similar markings on 216's? It certainly resembles a factory stamping, not something that's been added later.
Jerry