It has grown on me a bit after all this years, so I'll admit that Eleanor wouldn't be so ugly with just a few less lights in the front, a better bumper, different wheels and ride height, and less '90's Audi' paintjob. And the grill, oh the grille...crucification would be too nice....
And, no Rich, even if Caroll Shelby has become an old attention whore who will sign any paper that grants him money, Eleanor is not a real Shelby Mustang (although I'm afraid they may have destroyed (raped) one real Shelby to make an Eleanor(unconfirmed rumour), but it wasn't used in the film I think.
The 'real' Eleanor from the actual car chase movie also called 'Gone in 60 seconds' (but with few other similarities with the Cage movie) was a 1973 Mustang Mach 1...