go for 5.4 3v and it fits under your stock hood. 4.6 3v is even easier. 5.4 2v no way. too limited on non-boosted power. most truck guys are making 280rwhp with only bolt-ons. headers,duals,filter, tune. there is more there. if you use ther 4.6 stang
pcm or your stock pcm with the cam timing altered you will enjoy it.