comp cam xe-268h

XE275HL in a low (9.0 to 1) compression, .030 over 340, 727 in a '72 Duster, 10" vacuum and with nice lope. Good cam with good street manners, with excellent low speed torque. These XE cams do lend themselves well to street duty, and they make good power too. You should be fine with your combo, as it is. But...I too agree..10.0 is a bit much for pump fuel. Much easier to adjust now..before you get it together. Good luck and give us a heads up as to what you end up doing and the results. Terry.