The 500,000th Corvette, a white 1977 coupe, rolled off the St. Louis assembly line at 2:01 P.M. on March 15th, 1977.
1977 was the last year for the notch back roof line.
The aftermarket "Moon Roofs" (glass t-tops for Corvettes) were supposed to be optional equipment in 1977, but the manufacturer had a marketing dispute with Chevrolet. GM developed their own glass panels for the 1978 model year.