How hard is it to build inverted scoops in the hatch like this photo? I'm planning for the cat project hatch something like this. The engines are low enough in the bilge to have a flat hatch without big scoops for the ladies sun bathing but I need to get some air in there too for the whipples. I see some big cats with big power without big scoops. Are these inverted scoops the trick?

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Naca ducts. You can buy fiberglass or carbon fiber ones premade and glass them in

Don't know this place, just the first thing to come up on google.

http://secure.chassisshop.com/partlist/5731/