I'm sure that you already know but I found this to be a good read and quite interesting, the only reason I haven't gotten a 5.0 is this
http://www.themustangnews.com/conte...ns-of-modifications-to-2011-2012-5-0-mustangs
You play with fire modding any car, but just an intake and ford basically says screw off.
You are very late to the game.