Im still beating my head against the wall on how i want to do my motor (roots, procharger, or twin turbos), but have a question in the meantime. If i go ProCharger, i am thinking F2. It will be on a bbc. Is there a certain power level that it pays to go direct drive to help crankshaft longevity instead of belt driven? If i am only after 1000hp + range should it even be a concern?