Classic Industries offers a wide selection of Engine Gaskets for your 1966 GMC All Models. Classic Industries offers 1966 GMC All Models Head Gaskets, 1966 GMC All Models Intake Manifold Gaskets, 1966 GMC All Models Oil Pan Gaskets, 1966 GMC All Models Rebuild Sets, 1966 GMC All Models Timing Cover, 1966 GMC All Models Valve Cover Gaskets, and 1966 GMC All Models Water Pump Gaskets.