That article on The Bronco Lean has been posted on lots of web sites. Here's a version on the BroncoFix.com board.
http://www.broncofix.com/about261578.html
The deal is, if you remove the radius arms from the front differential, as you would if you were replacing the c-bushings, you have to insure that the radius arms wind up exactly parallel. If not, the radius arms and front differential act like a big torsion bar and torque the suspension to one side.
To check to see if this is the problem, or to fix, remove the front differential and radius arms as an assy. Sit the front differential on some jack stands, and lower the radius arms. If they're parallel, the ends will touch the floor at the same time. If not, remove one radius arm at a time and retighten the cap. Lubricating the c-bushings with something (wheel bearing grease, dish soap, KY, etc) seems to help the bushings seat correctly.
