interesting.
on my 67 new yorker, we tried to fit the motor and box back int he car together but we couldnt get the sump to clear the crossmember without the end of the gearbox tail section hitting the floor or thebellhousing/heads hitting the firewall. Maybe having the car up on hoist, higher off the ground works but heck, that is soooo much weight having tipped over nearly vertical, the engine lift probably wouldnt go high enough and would be rather tippy.
ended up having to split them apart, put motor in then box up from under. Right pain in the ***!
maybe, taking the sump off was going to work but i dont think i could be bothered re taking it off, cleaning it all up then resealing everything again under the car, its a bit of a mish doing that on ya back on the ground. ( done that before too ) ;/