I have a production 4.1 block, 4 in bore,3.6 stroke,9-1 comp2 billit mains,rjc girdle,,cnc ported alum heads,t-4 6466,cruz t4 headers, v band 3.5 down pipe,9.5 ptc conv,street car mild abuse,fast xfi,83lb seimens inj,450lph pump,93 and alky,will keep rpm under 6k, was thinking 218/218 roller cam, what would you recomend ?thank you.