Has anyone used this cross over arm? http://www.rockequipment.com/crossover.htm Anyone have an opinion on that arm or this one? http://www.metalfusionfab.com/steering_arms.htm Is it better to get one with the top kingpin cap integrated into it or get one that uses the stock cap? Or does it not matter? Alos what pitman arm do I need to use. I am open to sugestons. Thanks!