Pontiac Pegasus Concept, 1971. Designed under the direction of Bill Mitchell, GM Design Vice President, based on a 1970 second generation Pontiac Firebird. The prototype was built in collaboration with Enzo Ferrari so the styling was modified and the car was fitted with Ferrari 4.4 litre Tipo 251 Colombo V12 engine, 5 speed gearbox and exhaust system. The instrument panel gauges were also from Ferrari, the wire wheels were from Borrani. There was a GM posi-traction rear axle with 4-wheel disc brakes from a Corvette. It remained a one-off and is part of the GM Heritage Collection