This discussion can surely get complex, but for the old Demon having a hood scoop which isn't sealed, it will surely keep the engine cooler, even going back to the old Hemi Super Stock Barracudas and Darts, some would find that it was better to run without the plate that seals the carbs to the hood because the cooling benefit would outweigh the ram air effect for performance on the drag strip.

Edit.. removed my excessive babbling..

Cheers,
Mike