Tango...thanks for your replies and I do agree in a sense. Using camquest, the obvious cam is the XE268. Makes similar HP to the best cams plus the torque is greater. That was my choice from the start. Then when we started running DCR calculations the dynamic was ending up as high as 8.3 with the XE268's 60 degree intake valve clsoing. This way too high in most peoples opinion for pump fuel. The 270 wasn't much better with an IVC of 61. So even though I was giving up 2HP and 10 Tq(according to my numbers on camquest) the desicion was to be safer. No forged pistons to battlle detonation either. I have read numerous posts with guys running the 280 in similar 327's with less compression etc... and they have been happy. Hope I will be...lol You believe an MSD will be valuable in the running quality of my 331?