I have pulled the transmission and re-installed it with the engine in place. The bolts are not fun but you can get them out. Make sure you mark them all because there are 3 different lengths and they go in specific places!

WARNING! Make sure you pull the crank position sensor off of the top of the bellhousing before moving anything! It's only a $22 part if you ruin it but it will make it very difficult to get the transmission separated from the engine if you wedge the sensor body in there!