In my quest for milage and torque, I'm going with a Comp XE256H cam. It has a dual pattern so is much like using a 1.5 and 1.6 rocker. For best milage and torque, the fastest off the seat lift rates are desirable. The 1.6 rocker will increase the lift rate off of the seat. The next step is to use a roller cam (roller cams have very high off the seat lift rates), but that is costly.