There are two main problems with the 5.4L, weight and 2V. Look what happens when you add 4V and a blower, easy 500+rwhp. Also the 2000 R had 375hp n/a from a 4V 5.4L. The aluminum block is something like 75-100# lighter, which was good for 3 seconds on a road course in the '11 GT500.
The new...