installed SS springs and pinion angle is at 0

Locomotion said
Pinion angle is the difference between the pinion yoke/shaft and driveshaft. That needs to be measured and adjusted - if needed.

-1* between the trans and driveshaft is good. Mopar book says 2.5* or less, but not "0".

The pinion angle is just that. The angle of the center line of the pinion gear relative to horizontal.

The angle you are referring to is called the "working angle".