Lean condition under light acceleration

Update: I have a spare parts carb that I was using to chase the air bleed circuits (just to get a better idea of where the circuitry originated and terminated).
The primary bleeds on my parts carb where smaller than the one in the car so I decided to swap them. The result a slight enriching of the primay circuit overall but more importantly my lean spot clearing up.

I didn't get a picture of the work but these are the bleeds that sit up against the choke horn.