Astro II XP-880 Made its debut at the 1968 New York Auto Show. Its predecessor, Astro 1, was an extreme design; it did not have conventional doors and was powered by an air-cooled engine. The Astro II was not called a Corvette but it featured a standard Corvette engine and conventional doors. The mid-engine powertrain design was radically different from the standard Corvette chassis. The entire rear half of the car's fiberglass body is hinged to tilt up for engine access.
1954 Motorama showcars. From front to rear you see the Corvette, the Corvette Hardtop, the Corvette Corvair and the Corvette Nomad. From the last three, only the Motorama Experimental Show Cars were made. How many? No one really knows. As one might expect, the "Corvette Quartet" had a definite familial resemblance, though each had its own specific personality. All four cars featured the same front end design, with its toothy grille, mesh-grilled headlamps and pontoon-like front fenders.
1973 Corvette XP-898. It looks a bit like post-1982 Corvettes, but the one-off XP-898 of 1973 was actually built on the chassis of Chevy's small four-cylinder Vega. It's mission was to test feasibility of a new "sandwich" fiberglass body construction using a foam filler that could be varied in thickness to provide desired strength in specific areas. Though it looks a bit dated now, XP-898 would have been a great replacement for the '68-vintage "Shark" Corvette in, say, 1975.
There’s some question about the body on this CERV II from 1963-1964, because there are pictures (poor quality) of an earlier and different looking design. The CERV II was intended to be a competition car, and it had formidable performance from its revolutionary four wheel drive system. It was unusual, to say the least, with a Powerglide automatic on both ends of the 377 CI advanced V8, each one feeding its respective axle. It could top 200 mph, and knock of the zero to sixty in 2.8 seconds.