I Had to install a transmission/xfer case in an old FJ40 that I owned many moons ago, and used a similar method. Being by myself, and the combo was over 250 lbs, I used a cherry picker thru the driver door and picked up the combo. Slid the trannie/xfer under the vehicle, came thru the door with the cherry picker and picked it right up. It took about 20 minutes, As I picked up the combo, I was able to guide it in from the top and it slid right in. Granted the land cruiser was a beater and I didn't care if I knocked around the interior. I would think the balance point of the hoist in the bed is all wrong though, must have been really "tippy"