I dont know what happen Brian, but the pistons are not in the hole. He had 9.7 compression with a 260@50 cam. Running 91 octane at 7.2-7.7 DCR, I really doubt he was detonating..I ran this exact cam with 10.7 compression and ran 91 and didnt blow a head gasket. I honestly think he did not torque the head bolts correctly, but if he detonated then I have no idea why with that little compression at zero deck and that big of a cam.
