Basically, they will be run across a bar infront of the grille, I've got a set of brackets that I am going to finish up at work this coming week. It's about a 21 inch span, each light is roughly 4.75 inches wide. The way they will be set up, the lights would be positioned in front of the crossbar, so air flow shouldn't be too bad. Eventually down the road I will get a mdb bumper as well, and I'm going to swap the bar over to that, but that isn't for a good while now.
Here's an idea of what I'm looking at. Keep in mind that the lights may be a bit bigger than in reality. Yay for crummy photoshop skills. Just used an old pic, so bracket and bar aren't there yet.


Edit: Combined my two posts (the pics and first part)