correct angle for a drive shaft with 2 joints

[gn7]

V Drive 90 degrees to the stringers , 2 degrees minimum drive shaft rise to the engine ,I would set the engine at the same rake as the drive shaft.

Are you suggesting he remounts his V drive, including resetting his strut, and possibly moving one if not both if need be? V drive angle trumps the prop shaft angle and strut placement?

If I have a Biesemeyer with a 7* strut/shaft angle, how do I get the top shaft of a 10* box parallel to, or the mounting flange 90* to the stringers?