Thanks for all the help. I think I got it. I had to grind off part of the bell for clearance, but I touched up the paint after. Then I ground the front of the block flange level, and drilled and tapped two holes. I leveled the engine and then leveled the slave, and eyeballed it for lateral alignment. It seems to be pretty close. I also ground off some of the fork (thanks to Patrick). Once I have a spring on there will be enough room to allow for about 1/8" of play, maybe a bit more.