Since you have a Vulcan you may, just may have enough room.
Take off the Y pipe under the car.
Disconnect wiring connectors. Cables, heater hoses @ the firewall etc. Disconnect the serp belt. Disconnect the AC
compressor. Remove the cooling fans. Line the area in cardboard to protect the rad. Strap AC
comp out of the way.
Get a cherry picker, hook the engine.
Get a jack under the car with a 2x6 or 2 of them bolted together, and brace the transmission by the pan.
Take the bolts around the bellhousing off the trans (IIRC
6 of them).
Now take out the bolts that hold the motor to the motor mounts. unbolt the brace that holds trans/engine together on the passenger side.
Heck you might be able to pick the engine up and out of the car like I did. Not sure you can get enough leverage/oomph to break the flexplate bolts loosen. They are on there pretty good. Heck if you've done everything as described above, you could yank the engine up high enough that you can zip each nut off with a impact gun, and turn the crank to get at each one.