1. Here's the Chassisworks eight-point rollcage kit. The bars are 1-5⁄8-inch by 0.134 wall mild steel tube. The main hoop, side, rear, and windshield bars are all bent specifically for the Chevelle application. CAC has multiple GM applications, so if you are reading this, then it's a safe bet they have something to fit your project. If they don't you can go through the special order process, and they will use their tools and materials and bend the stuff to your measurements. We upgraded to a removable seat belt bar to go with the swing out door bars that come included with our kit. Rocker tubes, dash bar and helmet bars are available options.