Airgap Mod when using EFI

I have an air gap on my 340 with the MSD Atomic FI on it. Its not in a car yet but running on the engine stand sounds really strong. I saw that engine masters episode but if I dont recall it being a Edelbrock rpm air gap....was it? Might have to revisit that episode and see what intake it was. I do remember them getting more power after milling the plenum divider. I dont see how it would be an EFI specific issue but who knows.