MopaR&D, I had to re-read some of your posts to find out exactly what the issue is. Am I correct concluding that you are tuning for a certain AFR reading, vs jetting for maximum WOT power? You mentioned the carb was performing great. While all combos will be different, I found mine to run best with about 12.7 AFR After much testing and tuning at the dragstrip. I take it you don’t have the tuning manual or the specific jetting kit for the carb correct?