I want to mount a new outboard motor mount on the trans. of a S2 8.0 that is in my shop and I'm not sure where the water line is as the boat has been out of the water and has been repainted. Does anyone have a measurement for the water line at the stern and or how deep they think the cav. plate should be below water line to keep it under in moderate waves. Also any preferences as to port or starboard. There is a ladder in the center of stern that could be moved if needed but only if worth the effort.