It's time to link my Exhaust "torque tuner" thread to this CV carb tuning thread:

Exhaust Torque Tuners

Given the latest, I see 48 pilot jets in my future. I am still dialing in the G-Pop torque tuners.

With the pilot screws at 2-3/4 turns out, AFR is an the low-mid 12's at idle. Once just off idle, when the 4 pilot bypass holes are just uncovered by the throttle plates, AFR goes lean. That is not a slide bounce issue, it is a pilot jet issue.

Once the 48's go in I predict that situation will improve. Then there will probably be a bit more tweeking of the torque tuners and float heights.

God@mn I love that AFR meter!