I used to have this setup, and as far as i can remember, the bolt on one of the pulleys (I can't remember which) was the wrong size for the sram rear mech, which meant that you couldn't screw it in properly. I got around this at first by using the wrong size bolt, and just over tightening the bolt so it was gripped by the bearing caps. In the end it turned out that the shimano bearing caps fit both the pulley wheel, and the sram mech. As far as teeth are concerned, just use the same number that are on the mech in the first place, some people know a lot more about the no of teeth on rear mechs, so I'll let them, but I think you can end up jamming them if you put too many teeth in there. Not sure about fewer teeth though. Anyway, thats my two cents.
Being a Pirate should be considered a Manly job because pirates get two types of booty.