In 1963, Corvette introduced its all new Corvette Coupé and Convertible models called the Sting Rays. This was the very first time Corvette was available as a hardtop coupe model as well as the traditional convertible. Both cars featured an all new body design that was more stylish than the previous generation. It was also the first year for concealed Head lights. It also features an all new chassis, that includes an independent rear suspension. The 1963 Sting Ray Coupe featured a Split rear window design, but it was replaced with a single piece rear window in 1964 because owners complained about visibility. Chevrolet had to build second assembly plant in St. Louis, Missouri to keep up with demand, and dealers reported owners waiting months for their cars to be built. At the end of 1964 Corvette produced more than 20,000 units. In 1965, The Corvette had a 396-cu.-in. "Big Block" V8 under the hood. It delivered 425 horsepower. New was the four wheel disc brakes that become standard, The body didn't change at all. In 1967, the limited production L88 Corvette was officially rated at 430 horsepower, although some Corvette historians believe that figure was artificially low. Only 20 of the L88 Corvettes were built. George McDowell's 1964 Convertible is perfection in progress - a totally "Cool" machine.