I`d suggest 4 spreader bars on that scoop, that way the holes can be painted top+bottom and your not drilling after the fact. I`d imagine those huge scoops will catch a ton of air.
They do catch a lot of air. While I can't measure the amount of travel at the center of the hood scoop, I would say that coming up 2 - 2.5" on the big end is fairly accurate. Kinda freaks you out when you haven't raced in while...lol