used to have a mk11 cavalier and you could change the clutch without removing the gearbox,you withdrew the input shaft from the end of the gear box and clamped the pressure plate and friction plate together with special brackets then withdrew it from a large opening at the bottom of the bellhousing i don't think they carried it on past the mk 1 shame if they didn't you could change a clutch in about an hour and a half, a haynes manual will tell you otherwise
bob k
August 2010