[Pilotdave]

I suppose that a very patient person could change that fork without removing the engine and flywheel. You'd have to "operate" through the inspection opening - and be able to drive the old pin out, then pull the shaft out the side of the housing (hoping that the fork will slide off Woodruff key), then reverse the process including driving in a new pin!

I just replaced the fork and shaft in my Tudor. They are the newer versions of both. Both are repro parts. No Woodruff key but a larger diameter pin. The arms on the fork had a flat surface and a rounded surface. The fork should be installed with the rounded surface against the shoulders on the throwout bearing casting.