RPM airgap with carb spacer?

Milling the center divider allows the engine to draw off of the entire plenum volume instead of just half. Ever notice how the Air Gap for the small Chevy has the divider milled already..says alot doesn't it. The small mopar..THE best small block ever... !! If you are thinking of milling yours..try an open spacer FIRST before you mill, 1/4", 1/2' or 1" , that will give you an idea of how it will behave milled..besides..it's kinda hard to put it back once machined..