I picked up a complete 1965 MkX 4.2. It turned out to be stuck. Oh well, I planned on rebuilding it anyway. How bad could it be? Um, kind of bad.
It looks like #1 is going to need a new sleeve and piston. Hopefully it is savable. The other cylinders have surface rust, so I might get away with a hone, but will probably need to be bored out… plus new pistons.
The head at #1 was caked with corrosion, but doesn’t look too bad underneath. The head gasket was intact, but it was stored without the spark plug and the safety wire was gone from the cam gears. The seller may have known more than he let on. It was stored for 30+ years in a Florida (humid!) shed. Fingers crossed the head is in decent shape.