Back in 1965, Chevrolet’s St. Louis factory produced 8,186 coupes and about double that many convertibles (15,378).
Out of those 23,564 Corvettes, only about 10 percent of them were made with air conditioning (2,423). Not surprising, really, since most cars of that era didn’t have AC either, and furthermore it was the second-highest priced option on the list at $421.80 behind the top-of-the-line 327/375 hp fuel-injected engine at $538.