While some argue the Buick Century (first mass-production car to hit 100) was first Muscle Car, and others argue the 64 GTO (first Intermediate with big block) to me the 1955 300 was the first.
If you like to discuss Mopars with others, check out the Mopar forum in the “I Hate Facebook” forums. http://www.daveschultz.com/forum/forumdisplay.php?fid=9
