I'm sure we can all agree that the "Muscle Era" was generally 1968-1972, though we can sometimes paint that with a broader brush and say 1964-1974
Myself, I look at 68-72 being the peak of the era, and generally agree with the offerings from the 64-74 years, but a few from the late 50's can qualify as "musclecars", they only lack the nomenclature..... same could be said for some foreign makes
