Hi all. I spent all afternoon helping a friend try to remove the clutch from a 1988 Chevy C70 farm truck. We got the transmission off ok, but cant figure out how the clutch comes out. The bell housing serves as the rear engine mounts. First tried to drop the clutch out the bottom through the inspection cover, but not enough clearance. So blocked up the rear of engine and tried to rewove bell housing. Took out all the bolts we could find and some we couldn't hardly find! But it is stuck. Maybe there are some alignment dowels that are rusted stuck or something. Any advice on how this comes off?