most bell housing i've seen have and inspection cover, iff you pull out the floorboards you can check the pressure plate wear, A lawyer friend got a 34 pickup as payment it had a rebuilt motor and the clutch wouldn.t release. They told him to pull the rear end, trans then the clutch. an 8 hour job. he only checked the oil and washer fluid on his cars so he asked me to check it out. I started it in neutral and warmed it up. then pushed it into the street. Started it in gear full throttle did a few burn outs with the clutch pedal to the floor, finally broke the disc free from the flywheel. I think they resurfaced the flywheel and the cutting fluid was absorbed into the surface then reacted to glue the new disc to the flywheel. I slipped the clutch a few times to heat it up and burnish the disc. the last I heard he had no more problems. Ps he gave me a $100 for 15 minutes work. said a shop was telling him $7 t0 800.