OER Parts offers a wide selection of Cooling System Components for your 1968 Pontiac Executive. OER Parts offers 1968 Pontiac Executive Overflow System Components, 1968 Pontiac Executive Hoses & Clamps, 1968 Pontiac Executive 3/8" ID Radiator Overflow Hose, 1968 Pontiac Executive Radiator Overflow Bottle, Hose & Cap Set, 1968 Pontiac Executive Overflow Hose Retainer Clip, and 1968 Pontiac Executive Overflow Hose Clamps.