not your typical pinion angle post

The pro mod car should have 0.0 or it's not right, as should any race car, anything at 4000 shouldn't have more than 4 degrees, after that the joint can not deal with oscillation speeds.

Pinion and trans angle needs to be alleviated as the shaft rpm increase. For a DD the rossler diagram is ok, and up to 5 degrees is ok because shaft rpm with the rossler set up won't exceed 4000 rpm, and most likely not long...

If you are doing anything performance you want 0.0 under load and then you don't look at rossler diagrams anymore.

Having any angle in a pro mod shaft is entirely to much for the operating angle which needs to be 0