My 2002 Chevy Silverado has atlas leafes and king double bypasses and it rides very stiff in the back. Are atlas just stiff leafs? The kings also need to be revalved very bad. When I go through woops the back end bounces on top of the woops, the rebound Allen is screwed all they way out and still doesn't rebound fast enough. How do I go about revalving and is it possible to get a softer ride?