Somewhere between 3 and 4, I've found it helpful to use two lengths of allthread about 2" long. Screw one into each side of the adapter and use as a guide into the bellhousing holes when going together. Make sure there's nothing behind the bellhousing holes that the allthread could injure as it goes in and make sure they aren't too long to remove with the motor and all in place. Once you get a couple bolts into the adapter, screw the allthread out and replace with bolts.

Another tip is to use an engine leveler. It takes the pain out of puttin' a motor in. They're available from a variety of sources, maybe even from a local rental place. Here's a photo of the Eastwood model.....
http://www.eastwoodco.com/jump.jsp?i...emType=PRODUCT