I put an 8-foot piece of 4X4 wood through the open windows, and use a cable come-along to suspend the transmission. Removing the shifter makes it easier to manipulate. Bolt a short piece of chain to the top of the trans, using a couple of the cover bolts. You can suspend the transmission on the cable while you change the clutch and you won't need to drop it all the way out of the truck. I've changed a bunch of clutches that way, even out on the road with no solid floor underneath.
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!