So i'm thinking about purchasing the, ATI Performance Products Harmonic Balancer 918476. Part# ATI-918476 At $350.00 is this piece going to benefit me? Could it actually throw the Balance off? Do I need to have the motor built with this piece in mind or can I just throw it on go? Is it worth the price? People who know the answers to these types of questions please chime in. Before I throw another $400 in the hole....Thanks!