Of all the Corvettes, it is the midyear models that represent the most successful blend of elegant, sensuous curves and raw, exhilarating power. Unfortunately, with their unpredictable rear suspensions, springy frames and razor-thin tires, these Vettes fall well short of perfection when judged by contemporary performance-car standards. The result has been the rise of the resto-mod movement, whose adherents remove factory parts in favor of modern replacements, while leaving th