So what IS a muscle car?

YY1 said
...but I don't think they had "440" badges.

a 300 letter edition, or a Hurst edition OTOH.....

I had a '68 Fury III 4 door that was badged on the front fender "V8 Commando" ..... It had a 383 Commando with dual snorkel air cleaner and all, factory dual exhaust and disc brakes.