what kit are you looking at the factory5 site has got lots of info on mods in cobras the guy that is most known for it is sergio who put a 03 s/c in one
as for the 5.4 I'm not sure if it will fit guys have tried but do not know how successful they were
with enough money and fab skills anything is possible!
sergios site
http://www.csx427sc.citymax.com/albu...40/1444655.htm
Bobby