I'm slowly googling away at information. So far this thread seems very interesting
http://www.jalopyjournal.com/forum/a.../t-705574.html

This guy reccomends not to run parallel links because of the bind issues and by moving the rear link mounts closer so its non parallel, he was able to completly eliminate binding to the point of the heims/ball end were *****g out.

from what I understand now, its binds when one side is compressed, looking side on the links won't be parallel anymore. So and changes the pinion angle...So the forces try to twist the diff assemble.... But the problem is... The other side is trying to twist the diff too... But in the other direction. That's when u get bind....