With the dust cover removed from the bell housing, have someone push the clutch pedal down fully (engine off) and slip a putty knife between the clutch disc and the flywheel. If that doesn't work, get the truck pointed down a straight road, start the engine with the trans in 1st. gear, push the clutch pedal down, and nail the brakes. One of these procedures will unstick the disc from the flywheel.
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!