oooh now your talking! I've been wanting to figure out a way to do this as well.
I have the same problem for intake air though. In the olden days, cowel air induction worked GREAT because it was much higher pressure. Nowadays there is only a very small pocket of stagnant air there that we're trying to get at, and it's just not working for me. I had a stoopid idea of putting a little scoop on the top of my cowl reaching into the attached flow area, hopefully that would ram plenty of air into my car, and with such a small frontal area, it shouldnt' contribute to drag. Taking air from the front of the car is another interesting idea as well. The only problems i could see would be heating of the air from going over the engine.
how bout the old style vents cars used to have under the dash. They got their air from the wheel wells. There is a pretty good bit of pressure in there and would blow a lot of air into the car at speeds. It would also help reduce drag.
The idea on steroids: dramatically increase air flow from the frontal pressure zones into the interior and blow it out the back using electric duct fans, improving overall aerodynamics and adding 5, 10, 20 lbs of thrust in the process (for hella long engine off glides)