The Definition of "MuscleCar"

to me a muscle car is mainly a stripped down type of car that came from the factory with just performance in mind. a slant six car or 318 car isn't a muscle car in my book. even with modifications its not a muscle car its then a modified car in my opinion.

340 dart- muscle car
318 dart- no muscle car
slant 6 dart- no muscle car

318 dart with a 440 transplanted-no muscle car. its a modified car.