UMI Performance 64-72 GM A-Body Front Coil Over Conversion Brackets Weld InUMI P N 4054 is used to provide a double shear upper attachment point for a true 2 1 2 racing coilover shock and spring. Most applications will use an industry standard 7 stroke double rod end shock and 12 x 2 1 2 diameter coilover spring. The bracket bolts to the upper a arm mount in order to properly locate the unit for welding. Prototyping was completed using Afco Pro Tour Elite shocks. Your brand may require additional modification. Please contact