Hotchkis 64-72 Buick/Chevy/Olds/Pontiac GM A-Body Extreme Sport Rear Sway BarHotchkis Sport Suspension 2282R 1964 1972 GM A Body Extreme Sport Rear Sway Bar. The Hotchkis Extreme Sport Rear Sway Bar for your 64 72 GM A Body is designed to eliminate the hard mounted factory design rear bar allowing for better rear suspension articulation in extreme usage vehicles. This system allows the rear sway bar to slightly pivot reducing fatigue and stress placed on the sway bar in the factory design. Handling and traction are