If your going to run a crankshaft driven supercharger you might want to run one with center counterweights I don't think Ohoi Crankshaft company makes any center counterweighted crankshafts I wouldn't consider a new billet crankshaft either at your desired HP goals A good forged steel center counterweighted crankshaft is great with a roots type supercharger or a crankshaft driven centrifigul(SP) supercrharger