OK, so my 15 year old son was watching B-J Auction with me, asks when did the term "muscle car" first come into use.
I was playing with cars in the 70's and don't remember the term. In the 80's I had a 1972 442 convertible, and even then don't remember anyone saying "hey, nice muscle car."
When was the term first used? When did it come into common use?