Point the pinion at the trans tailshaft weather it's higher or lower than the trans.Set the angle in relation to the shaft angle.
SS springs-4to 6 degrees negative of the shaft angle
ladder bar-2 degrees negative
four link-1 degree nagative
We been doing it this way forever and never had any issue with drive train componants.We do all types of race cars from stock to blowen chassis cars.
We don't care what anyone diagrams the process as,we do what works in the real world.Everything else is too confusing and open to interpatation and "pinion opinion"