Well it turns out I was mistaken. The crankshaft key was not sheared. Only the camshaft key was broke. So I pulled the crank gear off for nothing. Some of the ugliness of those threads in the crank is residual loctite. I just got back from town, had to run for a woodruff key. Hopefully I'll know something pretty soon. Now I need to pull out my paperwork and figure out how I time this gear drive again.