That block code is supposedly from a Corvette block sold after after 16 October 1953 (used in Corvettes from late 1953 into 1955). The head code is supposedly not for a Corvette head but it is a 1953 code (most likely it has two bolts holding the valve cover to the head).
Is there a serial number (code) pressed into the ledge in the block, just to the rear of where the distributor enters the block? This would help to confirm the original use/year of the block. If this is a Corvette block, it might be of great interest to anyone restoring a 1953-55 Corvette.
Locations of codes are shown on this web page.
