The tranny should be on the mount but left loose. If you look where the firewall meets the tranny tunnel, just behind where the engine will sit, you might see a 1/2" spot welded seam running all the way around. Some of this might have to be removed to allow the front of the tranny to rise high enough to mate to the engine. I've never had to slide the torsion bars back but make sure you are on jack stand and you may have to drop down the steering linkage by removing the nut at the steering box and idler arm and let her hang down.