707 Hell Cat, what does it mean?

The Drag Pack Challenger should be the only thing compared to the 68 Hemi Dart and Barracuda.Race car vs race car.As far as a street car goes the Hellcat is the most powerful American muscle car ever built.It's not the most powerful car ever made,but should hold it's own.It's impressive for what it is and the only newer car besides a Viper that I would consider actually buying.I like what it brings to the table,but can't see myself driving around several years from now searching back roads and barns for that elusive SRT.