318 draw through build

This is a cool build. I know there was some kind of draw thru set up for 440 mobile homes that used the Rayjay turbo. No idea what size that was, but it is very similar to this.

My question is do you need to build any kind of dam in the floor of the intake? Seems like the forced air/fuel mix would blow across the floor and mainly get sucked down one side of the intake causing a lean condition on the opposite side. Is that even an issue? I know, I'm thinking too much.
I don't think I'm going to see any lean conditions between cylinders on this setup. The charge is aimed at the floor as well as the opposite wall of the intake manifold, so hopefully it will just be bouncing and swirling around all over the place until it finds a cylinder.