Have an ever so slight case of dieseling after ignition cut off. Like I'm talking like just a rough stop of the rotating assembly. Holley 4160 66 main and metering plate secondary. Idles at about 12:1 a/fr, part throttle cruise will top out at 14.8:1. What might I be missing? Timing isn't extreme, either imo at 21* initial 33-4* full.
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