440 Camshaft recommendations for up to 6-6,500 rpm?
What about a Comp Cams XS282S? 244/252 @.050 .520/.540 lift 110 LSA. Lash ramps supposedly allow quite a bit of fine tuning (+/- a few degrees duration so that you could even end up with the same intake/exhaust duration making it a symmetrical cam duration wise).