What could have been the ultimate 1972 stealth Supercar, a GTO/Firebird 455-inch HO-powered Ventura Sprint, never really happened. They built just one production-ready prototype. It was an unassuming Pontiac Ventura II Sprint coupe motivated by a 455 engine. Little more than a grille and badge-engineered Chevy Nova, this screamer with an EPA certified engine would have flown under insurance companies’ radar. Pontiac built one and everyone loved it. But it was not to be! I drove it in June...