The truck has an SM465 trans, which weighs 174 pounds according to the specs, so I'll put the trans jack under it and leave it attached to the transfer case while I try to pull the engine forward and out. Will try just separating the trans from the bell housing and hope the trans input shaft will slide out of the clutch.
If I take the fan and water pump, and all the accessories and drives off the front of the motor, and pull the radiator out . . . . I should have sufficient room to slide the block forward off the trans.
Will keep you posted on the progress . . . . sometimes things don't quite go as anticipated . . .