This may be a dumb question but I'm just curious. Those MSD red boxes. Are they necessary for street use. I understand they increase the spark energy but do you really need that? Isn't that what the coil does? I have a 351w with flat top pistons making about 10:1 compression, aftermarket cam, aluminum intake, holley carb, Unilite distributor and headers. What would the benefit be of adding one of these Multiple Spark Discharge boxes? I don't have a clue what the are for. Thanks