I think you are in trouble, to be honest. Those are the 5.4 with the supercharger, correct? If it is the same setup as I am thinking, only a few little mods get a lot of power out of those things.

FWIW, the new 5.0s are making 400+ hp from the factory, idle like a pooch and get 25+ MPG on the highway. I say Ford is doing something right. Fine with me, American all the way!