Look for captains bars cast into the block above the starter (none on the other side of the block). This would be a quick indicator of a '53 full pressure 235 car engine which originally came with a Powerglide transmission. It came with the two acorn nut valve covers.
Carl

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