Rallyracer,
There is a good reason that Cobra's with all of their horsepower are not particularly good at attaining the real big velocities and it has nothing to do with the chassis not being able to handle it.
AERODYNAMICS...the Cobra has none...zero,zilch,nada.
This is not saying that a cobra can not do 200mph but it takes an awful lot more horsepower to push the wall of air that a Cobra is pushing than it does to push the wall of air that a Ferrari is pushing.
The Cobra was bred as a race car and it did its job well, up to a certain point. The reason that the Daytona coupes were made was BECAUSE the roadster was not good at higher speeds and could not keep up with the Ferraris and what not on the longer tracks.
so as Jschiller alluded to you could make a Cobra able to do the big numbers all it takes is $$$$
Have a good one,
Dan