[Blair]

Look there is no doubt the Ford engine to fit from now on (if you want a new engine) is the 4.6 3v modular V8. Heads aren't as big as a 4v so it will fit better both width and height wise, air intake is exactly where you want it (at teh front like a LS1), same power as a 4v and there are already so many 'hot up' parts for them seeing all the new Mustangs in the states have them.