I did try the engine and tranny combo. Yeah, it didn't work, even with the adjustable engine positioner on the lift. It was easier to me to drop the trans. You can use the engine hoist through the door to support the transmission from with the transmission cover removed inside the cab and lower it to flat furniture mover underneath the trans. Then wheel it out of the way. Then do the opposite reinstalling it. Just a little advice, get all 4 wheels up on blocks for more ground clearance to work under the truck. I use 6X6 bocks of wood. Make sure the parking break works and also block the tires front and back to the 6X6's with lags so the truck will stay put!
Good luck, Jim
