Help with Hood Scoop Install

I have a 66 Dart. I purchased a hood scoop from unlimited part number #PR12. Im not a body man so I was wondering what is the best method/procedure for installing this scoop. The scoop is fiberglass while the hood is metal. The scoop does have a 1 1/2" flat all around the bottom but the lip is to the outside and not to the inside. Here are pics of the scoop.
Thanks Rod

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