Pontiac GTO was first released in 1964 in three body styles: 2-door convertible, 2-door hardtop and 2-door coupe. Initially, the GTO package was an option for the Pontiac Tempest and it included GTO badges, a 6-litre V8 power plant which developed 325bhp, 3-speed manual transmission with a floor-mounted gearstick, stiffer suspension, wider wheels with redline tyres and the iconic bonnet scoop. The production of the first generation of the GTO ended in 1967. The last-year model was updated mechanically and visually. The louver-covered rear taillights were replaced with 4 lights on each side of the vehicle, the split grille was updated to share a single chrome trim and the engine received a larger cylinder increasing the displacement to 6.5 litres. The new motor was available in three models: 265bhp ‘economy’, 335bhp ‘standard’ and 360bhp ‘high output’.