I'm not going to say that horsepower makes the muscle car, or that looks make the muscle car, etc, etc, but I'll break it down into three categories. Anyone can enter two cars per category, but please don't gush unless you've had hands-on experience.
1:
Performance.
2.
Look and Style. How well does it turn heads?
3.
Lasting Value, also known as "reliability", a word not often associated with muscle cars.
Example entry (not a real entry):
Under "Look and Style", I'm entering the Oldsmobile Cutlass 442, specifically the 1970 version.


Although Driver: San Francisco's rendition was less than impressive performance-wise, the overall look of the 442 is unmistakable and fairly unique, to the point that it has appeared in four separate Grand Theft Auto games.