Hotchkis Sport Suspension 19115 1967-1972 GM A-Body Lowering Coil Springs Set (4) 2 in. Drop (Big Block). Lower your Chevelle El Camino GTO or other 67-72 GM A-Body car with Hotchkis Sport Suspension lowering coil springs. These springs will lower your vehicle on average 2 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. Each gray powder coated coil spring is precision wound using the highest quality steel. Specs: 2 in. Lowered Front 580 lb/in Rear 124-159 lb/in. Motor: Big Block.(Big Block cars using aluminum heads or many Pontiac Motors such as the 400 should use the small block spring 19114. ) Hotchkis Sport Suspension 19115 1967-1972 GM A-Body Lowering Coil Springs Set (4) 2 in. Drop (Big Block). These springs will lower your Chevelle El Camino GTO or other 67-72 GM A-Body car on average 2 in. from factory ride height. 1967-1972 Chevelle, El Camino, Malibu, GTO, 442, Monte Carlo, Tempest, Skylark, Lemans, Cutlass Wagons/ El Caminos should not use rear springs without the use of 31750 air bag