My last stock type six pack set up liked 1/4 to 1/3 a turnout from gently bottom on the idle mixtures screws on the outboard carbs and 1 to 1 1/2 turns out on the center carb mixture screws.
it like to cruise at light part throttle cruising under 2300 RPM between 14.3 to 15.3 AFR on Oregon 91 octane pump swill with no ethanol in it
Best, max, vacuum reading got the higher AFR at cruise RPM in 2nd or high gear with 29.5 tall tires and 4.10 gears between 1200 and 2400 RPM