Edelbrock AirGap question

inertia said
Thought it was for a Holley 3 barrel to open.

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Just as a side note addition, Carter also did this to their AFB/AVS but I don’t remember which one at the moment. A short lived carb, both of them.

RustyRatRod said
This ^^^^^ was the only reason for the notch.

And then…. They realized a power improvement…..