Carb base air gap?

Howdy.

The 4100 Autolite I have has a machined bottom. The Weiand Intake I have has the 2 oval base for the carb. It too is machined flat along the center divider. No designed air-gap.

Here's the problem. If I use a 4 hole mounting gasket, there will be nothing for most of the gasket to sit on, it'll sag, and I think cause airflow issues.

A square gasket will allow there to be a gasket thickness's worth of air gap on top of the intake's center divider and allow air to pass between left and right barrels.

So the question: Should there be a gasket, like a 2 oval gasket, on top of the center divider as the carb sits on top to complete the seal or is it ok for air to communicate between the two sides?

I ask as I will have a true dual exhaust and have an A/F meter for both sides. And I just wondered about the effect of an air gap.

Thanks for the answers.