I’m also chatting on XK owners, but I am considering removing the XK 3.8, as to repair will cost a fortune,and the money I get for all or the parts of the 3.8 could go towards a more modern cheaper engine.
It’s the bell housing connection being the important bit as the one I have already connects to the outdrive.
Buy an el cheapo 4.2 from an S2/3 XJ6: even here, they’re cheap as chips!
Save the 3.8 as provenance, and when you can afford to rebuild it, it’ll pop right back in.
Go out so more. Jaguar V12…
Circa 1940. I barely remember An uncle had a runabout. wood planked. Power by an "A’ Ford engine up front. A bunch of pipes and valves to control the cooling water intake. fresh water only. Elephant Butte lake in New Mexico.