Originally Posted by
TheJet-09
There's something similar we used to do. Unfortunately a picture would be best (but is well beyond my capabilities on this site). In describing it, though, drop a plum-bob off the zerk of each lower ball joint. Take a 48"scribe and draw an arc on the floor (towards the center of the car. Then, where the two arcs intersect (two points), draw a straight line through those to the rearend. Perpindicular to that line would be square.
I believe that accounted for one front wheel being in front/behind the other, but there may be a fault with that method that I am unaware of.