First, let me start by saying if it was mine I wouldn't put cobra badges on anything thats not a real cobra. (Some call them posers.)
Now thats a pretty good idear therestroke the 4.6 to 5.0 and leave your stock badges on there. under the hood get one of those 5.0 cammer plaques that sit on the valve covers.
Now thats a pretty good idear there
On my way in today and saw an Aero V6 with a Cobra front bumper and snakes on the side, no other mods at all. The only thing that came to mind was "Ghey"