Well, I haven't mounted one, but I would like to think that I'm pretty inventive, so here goes...

Mount it behind that huuuuuge front bumper, and then run a small air line to a fitting mounted on the bumper. With a switch located in either someplace under the hood, or just behind the grill (out of site, but you can reach it without popping the hood) in reach of a probing finger.

I always liked the look of an air fitting on a bumper. It says 'I'm ready for anything...' or something.

Just remember to put a cap or something protective over the connector on the bumper, so it doesn't get packed with road grime, bugs, sand, etc.