Holley running rich at part throttle cruise

That's great.

If you saw the tables I posted yesterday, the big difference in the transition area was pIFR of .0295 to .028".
In the second one, you can also see where I point out the primary jets effect on high speed cruising.

Other differences in the main circuit between two charts; plugged the e-holes so it was like an older Holley block, made the pMAB a little smaller, and reduced main jet. Main air bleeds and e-holes can effect how smoothly and when the main circuit starts up.