8point, Did you cc the heads? Have you figured out what your CR is? I'd be curious to know. It sounds alot like mine except for the 0 decking and cam.
Best octane out of a pump is 91 out here and truth is it's probably not even that good. 6K miles isn't very much. I've had motors with 10K break ring lands and eat up bearings and I never heard any detonation. I'm not saying you're getting it, just that you don't always know until something breaks.
