This pic demonstrates the amount of pressure that's on the rafter and the exhaust riser to keep the engine somewhat more level and to where when you slide the tranny back the engine doesn't fall back further.
I would just loop the riser and have someone make a few turns around the pylon while you lift the tail shaft up. After finding desired height then tie it off.
Doing it this way will greatly assist you on reassembly. You can raise and lower the engine pitch to the transmission input shaft.
If you have questions please ask. Slot or non slot it won't matter. I've been in both. The only difference is one has a reduction gear and the other doesn't.