$320 for install? Sorry. Not sure how Ford charged you $320 for grille AND install if you can order them yourself from AM and get 6% discount as well. That'd still be about $170 for install.
Yeah, I didn't say it was cheap to have them do it, but you figure a dealership is going to charge you approx $80 bucks an hour and they're gonna do at least a couple hours.
But I get a 3yr/36000 mile warranty on the aftermarket install. So if it falls off or something, they're going to warranty it.