[Sizzler]

Looks like an old Jag 120 or 150 to me.
Speaking of which, isn't the new XKR, all alloy body, what you're hankering for? Maybe not the 427, but the same HP as the original 427 sideoiler. The rear seat's a joke so you could disregard it. Slap a cobra emblem on it and there you go, the new "Ford" cobra. No need for Shelby, and British car-based to boot.

Personally, I don't like your design, if you're truly looking for opinions here. Just weird. Just me I guess judging by the other responses.

I like what Ford's designers did with the new Mustang, I hope the same one's are let loose on the Cobra design, if indeed, it's coming.

As for parameters? I think it needs to compete with the 'vette to get the "us vs them" rivalry back. The Viper is at too high a price-point. The T-Bird, if you look at it sideways with your eyes sort of scrunched, looks like a Cobra...punch it up engine-wise and get the Mustang's designers to rework it and it would fit the bill pretty closely.