lot of work but if you cut up your bulk head, install the jack shaft below the tunnel in the corner it will get you some clearence. when you do this you move the jack shaft down, the drive shaft goes back and down. you use the same distances for everything. do a search on drop and roll chain case. there may be some pictures.
if you do manage to get 10 tooth in there, remember that that skid wont work with 10t extroverts without cutting back the warm for clearence.