are the 03 and 04 cobras 4 valve like the new 5.0s? found a nice 03 cobra, has 65,000 miles, lotts of mods, claims 479 hp, on dyno, wants 18 for it, its a convertible , really looking for the coupe, drove a few 03 cobras then test drove the new 5.0 , the 5.0 seemed to have more low end power, really thinking about buying the cobra, its already modded up far enough for me and ill save big bucks over the new 5.0.