Pinion angle question

Needs complete drivetrain to get it right. Loaded suspension.
I prefer to level the driveline-motor and trans.

RRR, its always been my understanding pinion points down a couple degrees when its all said and done.

i use the tremec app with my cell phone,jury is still out as i havent moved mine any further than shed to shop.

Yes, that's AFTER it's installed and in relation to the transmission output shaft. But as for installing spring perches, the pinion center line points UP.