How did you install your hood scoop?

I recently got an aftermarket twin snorkle hood scoop from Mopar by Crane. The fiberglass scoop's quality and finish is excellent. They don't include mounting studs, but it has a wide flange turned in about an inch along the bottom edge.

Sarah Crane told me some folks rivet them on, some use sheet metal screws, and others use barrel nuts to add their own studs. Regardless of how I mount it to Aaron's Dart Sport, should I put some type of weatherstripping material between the hood and the scoop? If so, how will water run out from under the scoop, since it would be entirely sealed in? If I don't use weatherstripping, what will prevent water from seeping into the holes drilled through the hood for the mounting screws/studs/rivets? Wouldn't that cause rust to develop around the edges of the drilled holes? Not to mention how it would soak the underhood insulation padding.

How have you guys with scoops done yours?

Jerry