All I have is the stock engine, but the odometer says 6970 miles! 106970 miles that is (swimmmin' pools, movie stars...)OOPs, wrong number.
I thought the same thing about the MG locks. You can easily replace the lock barrel to key all alike, too. Only problem i found out is that there are at least 2 types of door lock mechanisms; the one you describe, and the kind I got. Both use a kind of pushrod, tho.