Pinion Angle? Do I have this right before I cut it up?

https://www.tremec.com/menu/tremec-toolbox-app/

https://www.tremec.com/anexos/Literature/Driveline-Angle-Finder_Instructions.pdf

Take a look at this app and down load it to your phone. Follow the instructions to see if you're close.
If you run a search here you'll find tons of info and probably figure it out pretty quickly.
It sounds based on your numbers you might have some work to do.
Some pics of your driveline with the angles you have might help others understand just what you're looking at. I'm curious to see what you have and how you make out. Good luck.