Hotchkis 67-72 GM A-Body / 78-88 GM A/G Body Rear Performance Coil SpringsHotchkis Sport Suspension 1901R 1967 1988 GM A G Body Rear Lowering Coil Springs 1 in. Drop. Lower your Chevelle El Camino GTO or other 67 88 GM A Body car with Hotchkis Sport Suspension lowering coil springs. These springs will lower your vehicle on average 1 in. from factory ride height enhancing vehicle looks while lowering the center of gravity. The increased spring rates offer improved performance and handling while offering a comfortable ride.