So what IS a muscle car?

"Just what is a Muscle Car? Exactly what the name implies. It is a product of the American car industry adhering to the hot rodder's philosophy of taking a small car and putting a BIG engine in it. To balance this out, handling, braking and related essentials are modified to result in a performance machine for the streets. They tack racy names to the car: GTA, GTO, GTX, or just plain GT; R/T, SST, SS, GS or, for the lack of better initials, 4-4-2. They doll the car up with fancy trimmings and put it up for sale. And it sells like crazy"....Road Test Magazine 1967