i would not go with millenium heads they have prostock big chief ports,and only use GM prostock intake, valves are already insane 2.42 intakes with 6 inch stem, chambers are only 150 cc compared to 175cc on most. i would go with stage v raised port custom heads jobber is 2k bare 1k for valves,springs,cups,seals,retainers,bolts,gaskets, and 2.5k for complete roller setup with billet stands