Nice looking, a relative term at best. Show quality? Daily driver? Inexpensive race car? So many variables. What is a 'nice looking' race car?
Dick Smiths 198 car comes to mind. Original wheels on an original car, no 'wings', no 'air dams', no 'front spoilers', no freakish roll cage/roll bars. CLEAN lines, looks MEAN, goes fast, now THATS what I'm talking about! Put wings, dams and spoilers on a Cobra and you get some kind of 'hot rod', buy a Mustang and knock yourself out if you like that stuff. It destroys the look of a Cobra in my opinion.
Cobras at events like Run and Gun with aero effects should not be allowed to race, period. Spec Racers like the FFR series have their own event, go for it! BDR's doctored up with aero crap should run in their own group.