1405 lean at WOT

Float level & fuel pressure. Because of the excellent leverage system on Carter/Edel 4 bbl carbs [ AFB, AVS, TQ ] they will accept a LOT of fuel pressure & not flood. I have run 12 psi at the track chasing a lean problem on a TQ, no hint of flooding. It is a non-issue.
Fuel pressure & n/s size affect the final fuel level in the bowl. Higher fuel pressure & larger n/s size will raise the fuel level [ & vice versa ], so the float adjustment # should be increased to compensate. Carter published a chart showing the changes reqd.