The video of the challenger is from 2010 and I've done some work on it since then. Replacing all the bushes including the idler arm helped but didn't eliminate it. Limiting travel helps but may cause traction issues, especially with Caltracs.I also found out that E bodys use 2 different Pitman arms on manual steering boxes and they have to match the idler arm or the heights are different, this will mess up the bumpsteer as each side will then do it's own thing. At the same time, I flipped the tie rod ball joint/steering link bar to help with toe out on extension, but it still does it, though to a much lesser degree. I'm replacing the stock K member with a QA1 tubular after a big wheelie elongated cracked the LCA/torsion bar pivot mount, maybe this will help. IMHO, the only way to eliminate it entirely is going to a strut type front. HTH's