Try the old isky 616-590 grind, it's not in there catalogs anymore but they will grind it for you I think it is around 280@.050 with .616 gross lift on the intake and .590 gross lift on the exhaust side Better than the Mopar 590 grind

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)