If you are worried about torque with the 427 combo, have RyanJ put the larger 2.15 intake valve in those heads. Use a cam with less duration say 260-270 and more lift. The larger valve will keep flow up,the short duration cam with less overlap will increase cylinder pressure and low end torque. I have seen this work firsthand with the Indy heads. Ryan does this mod on a lot of Indys.-Randy