Use a small carbide tipped hole saw to bore holes in the bell housing so you can reach the pressure plate bolts that are hidden by the bellhousing with a universal joint socket. 3/4" or slightly larger should work. Then you can plug the holes later if you wish. Even if they're not plugged, the holes don't keep the bellhousing from functioning properly- - - -they just add a little ventilation to keep the clutch cool.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!