Since I am adding the scoop to a metal hood I was going to seal the carb to the hood with the idea that the air would be pulled from the back. This is part of my debate on the length, as I was curious if I need to have the scoop (front edge) very close to the carb thus making the carb the end of tunnel, if that makes any sense. It also plays into the height as I am unsure if the smaller the area the better the potential velocity.

Because of my hinged metal hood, I'm also processing how to the get the scoop to the windshield, currently I am thinking of trying to simply attach a fixed extension on the cowl area that would seal to the scoop when the hood is down.