US Car Tool Torque Boxes and Sub Frame Connectors Install

have the USCT connectors on 2 of my 1970 Darts. you are trying to make a box beam using the floor as the third side. The more completely it is welded to the floor the more effective the connectors will be. This set up made an enormous difference in both of the cars! 53 years of driving them had made the cars kind of 'flexible' and this really stiffened them up.