I've narrowed it down to two choices for the cam I want to install. Either the Comp Cams XE268H .477 intake, .480 exhaust, duration at .050: 224 intake & 230 exhaust or I'm also considering the Comp Cams factory muscle cam for the ram air IV, with probably using the non-ram air rockers, intake & exhaust lift .470, duration at .050: 230 intake & 240 exhaust. Decent choices?