The original ride height had the car sitting about one inch lower in the rear than the front. To get a level look order the rear springs 1-inch higher than stock.

While there was no question that the 1964 GTO was a success, the 1965 model proved that the first year was no fluke. The Pontiac A-body line was restyled for 1965. The most noticeable difference was the new front end, featuring twin vertical headlights. Output for both engine options was increased via revised camshafts and intake manifolds.

Four transmissions were available in 1965. Customers could buy a two speed automatic with either steering column or console mounting. Three floor-mounted, Hurst--equipped, manual transmissions were available; a heavy-duty three-speed, and either close-ratio or wide-ratio four-speeds. Many rear axle ratios were available, ranging from a 3.08:1 to 4.33:1. Light weight aluminum front drum brake drums became available, which helped stopping the car from triple-digit speeds - something the GTO could do with ease. A heavy duty radiator, power brakes, metallic brake linings and limited slip differentials were also on the options list.