OER Parts offers a wide selection of Brake Components for your 1964 GMC All Models. OER Parts offers 1964 GMC All Models Conversion Kits, 1964 GMC All Models Drum Brake Kits, 1964 GMC All Models Drum to Disc - Front, 1964 GMC All Models Drum to Disc - Rear, and 1964 GMC All Models Four Wheel Disc.