There has been an on-going controversy, not just in my mind, but i'm others as what constitutes as a "classic." i've been doing a lot of thinking about this and i feel i've come up with a reasonable and agreeable plan for car enthusiasts:
1) If the model year vehicle is something you do not see at least one per day of, then that particular year model can be considered a classic. So, for example, you really don't see a 73 or 74 c-10 or sierra everyday, but you see plenty of 83-4-5-6 etc. C-10's, c-15's everyday and often several per day.
So, in this case certain years of the exact same model of vehicle could be and are classics while differing(usually more recent) years are not. The same could apply to the 68-82 corvette; You rarely, if ever see a 68-9, while you can see at least one 80-81-82 per day.
Thus, i would consider a 74 GMC c-1500 sierra to be a classic, while a 87 chevy "V"-10 not to be even though they are the same design.
a)You must live in a major or minor metropolitan area for this rule to apply; If you live in, say, riverton wyoming, the rule does not apply. A minor metropolitan area could be, for example Des Moines Ia, Harrisburg, pa, Richmond, va, Columbia, SC etc.
b) Vehicles parked at a used car dealership do not count; Vehicles parked at shopping malls, other private property, public property or on public streets or driven on public streets count.
c) your time outside the house has daily must equal at least 1 hour. And the radius of travel from your home must equal at least 15 miles.
To be continued?