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bobcowan is right. You are rich. Next time you're on a dyno look at your a/f ratio at 2000-2500 rpm under light load, 4th gear. Should be up around 13.5-14.5:1. I think your jetting is too rich on primaries and way too rich on secondaries. I'm going to guess that your jetting should be closer to 72-74 pri. and 76-78 secondaries to get a good a/f ratio. Get the primaries dialed in first under light load lower rpm, then fuss with secondaries under full throttle high rpm to get your overall a/f ratio right. I have an MSD 6AL ignition that is set for 20 initial advance and 32 total all in by 2200 rpm. Car runs like a top. 10.83:1 compression, cam is .565 lift and 232 duration on intake with 110 lobe separation.