Is the 1962 Chevrolet Corvair 900 Monza I bought today.
For those not familiar with the Corvair, they're basically the American VW Beetle. They have a rear-mounted, air-cooled flat-6 mated to a 2-speed auto or either a 3- or 4-speed manual transaxle. They have four-wheel independent suspension, weigh only about 2600lb, and come in coupe, convertible, sedan, wagon, and even van bodystyles. It was GM's first compact car, and intended as an affordable, reliable entry-level model.
The Monza was the top-end performance model in 1962, with a 102-hp engine and the 4-speed manual. Later years offered a 140hp turbocharged version of the same motor.
They're very very odd, which makes them very interesting. They also were not very successful for a variety of reasons, not least of which being negative press thanks to politician and activist Ralph Nader, whose book Unsafe at Any Speed condemned the Corvair as dangerous due to its rear suspension design (a design shared with contemporary Porsche and VW models which managed to escape such judgement). 2nd-gen Corvairs improved the rear suspension, but by then it was too late.
Chevy killed the Corvair in 1969, with the Nova (nee Chevy II) filling in the compact-car role.
Some more pictures: