. . . to correct my foggy memory. There was a limited edition high performance Corvette in 1970, but it was a specially-built small-block 350 ci labeled ZR1. The ZL1 was offered only in 1969, and only two were reputedly built. Chevrolet sold approximately fifty ZL1 crate motors to the drag racing set; Bobby's ZL1 is licensed for street driving in California. That may be why he considers it unique.