Classic Industries offers a wide selection of Emission Control Components for your 1974 Chevrolet Truck. Classic Industries offers 1974 Chevrolet Truck Catalytic Converters, 1974 Chevrolet Truck Check Valves, 1974 Chevrolet Truck EGR Valves, 1974 Chevrolet Truck Emissions Sensors, 1974 Chevrolet Truck Hardware, 1974 Chevrolet Truck Hoses & Clamps, 1974 Chevrolet Truck Mass Air Flow Sensor, 1974 Chevrolet Truck Pulleys, 1974 Chevrolet Truck Smog Pumps & Components, and 1974 Chevrolet Truck Vapor & Charcoal Parts.