Dont have any of the fancy clutch bells but theres a shoulder on the shaft that sets the spacing. The gap from pulley to subframe is almost non existant but should not touch seal thats no good.
Other thing is if you grab shaft you should not be able to push pull too much just a tiny bit. Hmmm whats the word slop? If the In Out too much you have to try setting that bearing cap in the backside. Take a look at cheetahs wiki writeup.