Why can't you just keep it in the Compur shutter? I have many shutters, and don't find the black Copal shutter to be better or more reliable than the older styles, that is in my limited comparative experience.
I mounted my 9-1/2 Dagor into a Copal, and it was pretty expensive. Overall it is pretty reliable, but the speed dial recently got stuck at 1/500 and had to be repaired. Another time, it almost got stuck at 1/250. And the mounting job was pretty expensive. So I would need a very good reason to mount another lens into a newer shutter.
My 9-1/2 Dagor covers 8x10 with significant movement. The 8-1/4 would be cutting it pretty close, I think.