The valve cover with the center fill hole is like the one on my 53 with powerglide engine that has a 56 848 head on it. My point is, you need the stamped code behind the distributor to know what block you have. Someone can add all kinds of stuff to mislead you.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission