Just got my new bilstien shocks from Eric Shea and have never installed new shocks, what's the right way to install these new shocks? They come with one spring holder and two small flat washers and a nut.Isn't there a top cap that holds the spring on the shock,what's the best spot on the shock for the movable clip? What's the best spring rate 73 3.2 six 285 person . Thanks John