pontiacgp said:On my street car the stock upper that I boxed elongated the 1/2" hole for the bolt attaching it to the ear to 3/4". If you have the opportunity remove the springs and shocks and make the rear end travel and you'll see the binding that happens on all 4 links when running with bushings. That's why I made the suggestion. I now have the Roto Joint so I can run solid uppers and poly bushings with no bind whatsoever and I'll be replacing my boxed lower with UMI lowers with one Roto-Joint this winter
Can you take the bushing out of the box bar and replace to a roto, or you have to replace the whole bar?