One thing to consider when buying a new sway bar is the steel it's made from. My first upgrade bar was to an original Z28 bar(didn't know I could get one for a TA). It was about 13/16(IIRC). The next bar was a 1" Addco bar. I'd say the GM bar was as good or better. There are different types of frame mounts that can affect how well one works also. A buddy used to use solid alum mounts instead of the rubber or urethane bushed ones.