The Corvette C2 you refer to for Pre-66 is 187 GT but again guys, there is no way you can rewrite the history books. Although it has the vented discs all around, it weighs 1225kg as a minimum weight and if you reach it, has cast iron exhaust manifolds and much less performance option than a Cobra or GT350 let's say, then you have to handle the power over the distance and on those tyres. If the Cobra wasn't beaten by a homologated 'Vette in 65', there's a reason...