WOT too Lean

[fastd]

Carb is a Holley 850 Xp
Fuel pressure under the bonnet but on a 4 ft extension so not too hot.
Afr gauge is afx with ngk O2 sensor.

Increase in psi to 7 and increase to float helped a little but not enough.

High speed air bleeds are 34s...gonna try 31s or 28s?

[Gaz64]

Is the carb at factory emulsion bleeds and high speed bleeds?

Does it feel "lean", or does it go as good as you would think?

Where in the exhaust system is the O2 sensor mounted?

You could try some 28s first, and sneek back up to 31 if necessary with a number drill.

Gary