Well, it's cracked. How bad is it?

DARTH V8R said
Drill a 1/8"th hole where the crack ends, and call it a day.

I'm not sure I follow. Drill the hole at the bottom on the open area? I don't know that I could get to the top end of the crack with the crank still in.

Thanks for the replies. Perhaps it's not quite as bad as I had feared...