My 1964 Barracuda has the US Cartools weld in and we put a set made with rectangular tubing (welded in)in a friends car. I doubt anyone could tell the difference without looking underneath the car. The cars were equally improved with the different styles. I would recommend to weld and not bolt subframe connectors. They make such an improvement when everything is solidified. The US Cartools look a little nicer installed, the rectangular tubing is less expensive.
