This is the first of 2 big block roadster/hardtops built and raced by Frank "Skip" Panzarella from Long Island NY.  It now appears as a coupe modeled by Marc Godfroy after one of the Corvettes raced by Henri Greder at Le Mans in 1971.  The car has appeared at the Le Mans Classic and other vintage races in Europe.  More info,

http://registryofcorvetteracecars.com/ee/index.php/site/view_cars/919