nope i get it... your going to have to get everything even so all the weight of the trans is on a jack, and the motor on the crane. then they will slide apart. any weight on the trans thru the engine and they will not separate. i asked for a pic as i bet you have it pretty steep already, wont come apart that way...
as i said just pull the mounts off the motor and lower it a bit, jack up the trans and it will fall apart...