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Too much fuelpressure?
13.2 AFR is pig-rich.

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Hmm... on the gauge, 13.2 is on the lean side. Anything under 11 is heading into the rich side of the scale? Also idle RPM is 700. Will but a test light on it tonight to confirm other bits.

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I ran my BB pump gas stroker between 14.2 to 15.8 on 91 octane non ethanol OR pump gas.That motor had 10.29 tp 1 compression ratio, aluminum heads,518 C.I. with low deck six pak set up that ran real well after many changes to the carbs. What brand air gauge are you running and where is the sensor located? 14,23, maybe 14.25 AFR , is normally consider optimum on pump gas by the SAE standards for steady state max performance I shoot for 14.25 or leaner at idle, 12.8 to 13.3 at WOT and as lean (above 14.25)as I can get the transition and part throttle cruise mixtures