[daverascal]

I had the same problem while building my car. I built my own panhard bar, the longer the better. I could not get the rear end centered. Found the brackets on the rear end for the arms were welded in wrong location.The panhard bar is to control side to side movement. You can tweak the rear end side to side by changing the length of the panhard bar. Local shop builds promod cars taught me a bunch about getting a car square, amazing how much you can change the way a car handles by adjusting the 4 link arms.