The '69 Corvette also came with the ZL-1 engineThe Corvette straddles the line between muscle car and sports car, but when it comes to the 1969 Stingray ZL-1, we feel it belongs in the former category. The option was offered beginning mid-year, but the fact that it added more than $4,718 to the $4,781 base cost of a Corvette made it a rare choice for buyers. With all necessary options tallied, the total cost was over $10,000, or more than $90,000 today, and only two 'Vettes left the factory with this engine option. The model was created by Chevy to meet homologation requirements for the FIA and NHRA and was not initially intended for public sale. The ZL-1's officially reported output of 430 horsepower and 450 pound-feet blew away the base 'Vette's numbers of 300 horses and 300-pound feet, and the ZL-1 version was capable of a four-second 0-60 sprint and a quarter-mile run of 12.1 seconds at 116 miles per hour. The only 1969 ZL-1 convertible ever made went to Pennsylvanian John Maher, who blew the engine while racing it in local competition. Chevy provided a new short block, and Maher held on to the car until 2007. It was restored by its new owner, and Sotheby's auctioned it off for a little over $3 million.