i just installed a new spohn adj torque arm, and i think i understand the directions but how exactly do you find the true pinion angle??

 

Pictures would be a huge benefit to those instructions. Here is a link that may help you a little bit. http://www.go-fast.org/z28/pinionangle.html

 

Thats a good link but i ve talking to a lot of guy and this method is not the best one.

Here is the link of the best way to do it:

http://www.streetissuecustoms.com/pinionangle.html

The main difference between the 2 is that in the first one you take the ds angle and on the other one you take the transmission output shaft angle wich is supposed to be more precise .