Hotchkis Sport Suspension 19113 1964 - 1966 GM A - Body Lowering Coil Springs Set (4) 2 in Drop (Big Block). Lower your Chevelle El Camino GTO or other 64 - 66 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 lbin Rear 124 - 159 lbin. Motor Big Block. (Big Block cars using aluminum heads or many Pontiac Motors such as the 400 should use the small block spring 19112)