Only 2 known ZL-1 Corvettes. Aluminum 427 engines. When tested by magazine types, one ripped off a 10.89 sec at 132 mph on 9 inch slicks.
http://www.autofacts.ca/classics/FAPC/ZL1Corvette.htm for all the info. The yellow one was seized in a drug bust for cocaine use.
A good history of the white one. Drag raced for about 2 years, then sold.
http://corvettes-musclecars.com/cgi-bin/emAlbum.cgi?c=show_thumbs;p=1969%20Corvette%20ZL-1%20427-430HP
http://www.corvettelegends.com/zl1.htm A brief and good history of the ZL 1 Corvette