No expert am I except that I've needed to pull a number of motors over the past year or so. Aft of the center support is a grease cap for the spline. If you unscrew that with channel locks the shaft will easily separate when you pull the motor. Just be sure to mark the shafts so the they go back together properly.
Attached is the engine removal procedure that we use these days. Sounds like you are past this stage but you might find something useful.
Engine Removal Procedure.xls