I believe the NEMGTR has a record of this car and its owner and the MGCC T Register has a copy of this. Try contacting Kathy Ahrendt on the NEMGTR website - https://www.nemgtr.org/contact.html.
David

Steve, from what we've seen previously, it wouldn't in the least surprise me if the code was stamped upside down.

David

The MGCC T Register has done some work on T Type engine block date castings, including the date coding used, and you can find our conclusions at https://www.mgcc.co.uk/t-register/registers/t-type-chassis-and-engine-identification/#castingdates Using this code, Duncan M's block is dated as 8 April 19...