You can do that without a swap. But I ain't hating if that's your gig then go for it. You won't once you get yours done. Just ask Lil DQ about what a pain in the ace it is
the reason i said that was because you cant just punch out a 5.4 and expect 400HP like you can if you put a supercharger on it. you put one on for the extra HP to turn the bigger tires.
guys my 4.6 cant bark my tires on pavement even with 4.56 gears. and this truck is more of a mall crawler anyway. only sees mud when the gurls wanta go.