Yes, I expect exhaust clearance to be an issue so I will definitely take that into consideration.
The incline is taken with the car on stands, level as far as I can determine. It’s not easy to find a level surface I’m the car. I’ve used the top of the door side, the bottom of the window opening.
I did think of something, I will try to determine the side to side offset of the trans cross member bolt hole for the trans mount tomorrow.