Are my expectations too high?

smithchargers said
It is a Holley 4779 750 DP. That’s weird because I have noticed a weird vacuum noise intermittent but cannot find a vacuum leak anywhere

Gotcha. That style does not have the "feature" that I'm talking about. Mine is more than likely a momentary lean stumble...which I should be able to cure, one way or another. Pump cams and shooters are usually the way to cure it.