I was in the same situation as you as far cam decision,both the same cams as you have listed, I put in the Comp XE274h...same basic motor, Performer Rpm,mild porting,compression etc, with a 4 spd, ran a 750 Dp,then a 770 vac avenger. The motor had no torque, the cam was installed straight up.......then tried it advanced 4 degrees, better but still suffered in the torque department. now considering a cam change because not happy with it,i would try the Lunati or something different.