Clutch swap

[Bernie]

I'm sure this must have been asked many times before, but I can't find the search option so here goes. I have a K20 with a 4 speed and Rockwell transfer case. I am in process of changing the clutch. I supported the transmission on a cheapo gadget that goes into the top of a floor jack, separated the motor and transmission ans swapped out the clutch. I was trying to get the transmission into the clutch disc and pilot bearing when it fell off the gadget on the jack. Is there any trick to doing this ? I've changed clutches before, but this is just so heavy. thanks for any advice.