The manifolds are another challenge. There is no way in the world that the extremely high 5.4 F-series/Expedition/Excursion intake is going to fit under your hood. I tried it, and I have a 3 inch high cowl induction and it would not close. You have two options. One is to procure the 99-newer van intake for the 5.4 which is a lower intake, looks like the composite 96-up 4.6 intake, it SHOULD clear the hood on 94-95's, and will on the 96-97s. I say should because, while I have the intake, it is not on my car yet, and I have a higher than stock hood. The intake should work though, but because it is 99-up, you will need the fuel rails for a 96-97 Thunderbird or Mustang, because the 99 has a returnless fuel system, and the 94--95 rails won't clear the throttle body.

This is a quote from tccoa.com. This is coming from a guy that has done the swap and has had almost no problems.the only item i will need to get is the 96-96 fuel rails.i already have the engine(long block out of a 2000 f150) with only 47263 miles,all the electronics, and all the tools i need up at work.next step, 373s and a t5.(with moe money)