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There were several successful attempts to build a convertible ZR-1, most of them by private people. The DR-1 was a GM prototype to test the structural integrity of the ZR-1 chassis when it would be topless. The car was built by American Sunroof Corporation (ASC) for Don Runkle, who was the vice-president of Advanced Engineering Staff, which explains the “DR-1” designation. It was a standard convertible transformed to ZR-1 specs.
The 70th Anniversary Edition Corvettes will be unique, even among other 2023 Corvettes, in the following ways:  First, the Anniversary Edition cars will be offered in two exclusive color packages - an all-new White Pearl Metallic Tri-coat or a Carbon Flash Metallic. An optional stripe kit will also be offered in complimenting colors - Satin Gray on the Pearl White Metallic, and Black on the Carbon Flash Metallic. The cars will also be fitted with unique-and-distinct wheels with commemorative caps.
Corvette performed Indianapolis 500 Pace Car duties for a record sixth time. It marks the third consecutive year and 15th time overall that a Chevrolet product has served as the Official Pace Car – the most appearances by any brand. The 2004 Corvette that will serve as the Indy 500 Pace Car is virtually identical to the Convertibles available today through local Chevrolet dealerships.
The early C4's had their problems, what with the 1984 Cross-Fire Injection and its unusual 4+3 manual transmission. By the late 1980's, the fourth-generation Corvette had evolved into a more desirable automobile, thanks in part to the arrival of the ZR-1.