Issues not even discussed here are engine compartment pressures and temps. Big motors generate big heat, which means big radiators and big fans, which means much higher than normal engine compartment pressures and temps for stock bodied cars. Another reason to run a sealed scoop. One of the tricks that was used with the early max wedge cars was to raise the rear of the hood - and most were running sealed scoops - even if they were in the boundry layer - cold air was first and formost.