i would try to jet down the pri to 70 or so and if it goes lean on the top bump the sec up to 76 or 78. I'm not sure why its jetted square with a PV. as a comparative my 750 race holley is jetted 68 pri 80 sec with a 5.5 PV on the primary only sec is plugged, but i have annular boosters which give a stronger signal and don't require as large a jet.