Dan, what about putting some sort of partition (if you will) in the back, say, 1/4 of the hood scoop and putting an exit hole in the back of the hood scoop. That way (theoretically anyway) you could get some circulation out the back of the hood scoop. I actually like the way it looks, so i was trying to think of ways to accomplish what you want while still keeping the scoop. What do you think?
Rod