Im a big fan of crane cams and am looking to upgrade from my crane energizer cam to either a powermax or z cam. Which one will get better torque? I understand powermax has longer exhaust duration for better exhaust flow but z cams have accelerated valve action. I want almost the same specs i have which are .470 lift and 222 duration @ .05 Any suggestions on which one would be a better upgrade? HP is great but im leanin more toward better torque! Thanks !!