My Charger must have had a pretty solid unibody structure beforehand because my homemade frame connectors didn't seem to make a difference in the handling. They are 3x3 and welded at both ends. What I did notice from the connectors is how much more solid the car felt. Before, the car would shake and shimmy a bit when driving on rough roads. This is in a car with a fully rebuilt suspension. Afterwards, the car felt as if it just soaked up the bumps. One theory: The cars platform was more rigid, allowing the suspension to achieve its potential.