1964 GTO Classic Car it the first Pontiac GTO was an option package for the Pontiac LeMans, available with the two-door coupe, hardtop coupe, and convertible body styles. 1964 GTO included the 389 CID V8 (rated at 325 hp at 4800 rpm) with a single Carter AFB four-barrel carburetor and dual exhaust, chromed valve covers and air cleaner, 7 blade clutch fan, a floor-shifted three-speed manual transmission with Hurst shifter, stiffer springs, larger diameter front sway bar, wider wheels with 7.50 x 14 redline tires, hood scoops, and GTO badges.
This optional equipment included a four-speed manual transmission, two-speed automatic transmission, a more powerful “Tri-Power” carburation rated at 348 hp, metallic drum brake linings, limited slip differential, heavy-duty cooling, ride and handling package, and the usual array of power and convenience accessories.
Most contemporary road tests used the more powerful Tri-Power engine and four-speed. Car Life clocked a GTO so equipped at 0-60 miles per hour in 6.6 seconds, through the standing quarter mile in 14.8 seconds with a top speed of 99 miles per hour.