NA the 5.0 is better than the 3v. There is no disputing that. When you start adding boost things get fuzzy.
Enjoyed the input and the facts re boosting - which I did not know. Thanks. As far as NA 5.0 being better... I started this thread and never defined "better" for a reason; it is really a subjective term. I beat a 5.0 on the quarter mile with my 4.6 3v. Mine, stock tires and wheels, JT CAI, Brenspeed tune, Steeda UDP, Steeda CMDP, Steeda LCAs and Pypes Violators axlebacks. My combined mods come no where close to the additional 100 horses he had. On my side was a better driver and traction.
jbert has beaten some 5.0s on the track in his 4.6 3v. as well.
There is a video online that shows a 4.6 3v, NA, with cams and some other mods beating a Boss in a quarter mile race.
Point is that the differences are not always that huge. Yes, I can mod a 5.0 NA or blown, as I can a 4.6. In the end, the 4.6 is a good platform for the cost as a daily driver and a fun ride and having a 5.0 doesn't ensure you are faster...
Same money spent, which is faster, buying a Mustang with a 5.0 or a 4.6 and modding it? Which is more reliable? There are advantages both ways, but the 4.6 3v can be a great deal right now for what you get.