OER Parts offers a wide selection of Cruise Control Components for your 1978 Buick Century. OER Parts offers 1978 Buick Century Dash Mounted Switch Cruise Control Unit For Use with Non-Computerized Engines, 1978 Buick Century Dash Mounted Switch Cruise Control Unit For Use with Computerized Engines, 1978 Buick Century Column Mounted Cruise Control Unit For Use with Computerized Engines, 1978 Buick Century Column Mounted Control Cruise Control Unit For Use with Non-Computerized Engines, and 1978 Buick Century Universal Cruise Control Handle.