OEM parts categories for 1980 Mercury Monarch 8 Cyl 5 0L 3At C4: Air Conditioner, Radios & Shock Absorbers (Ac Hoses & Tubes, Air Conditioner Controls And Ducts, Heater And Controls, Radio - Citizen Band (C.B. Radio) And Related Parts) | Alternator, Regulator, Battery, Starter & Distributor (Instrument Cluster Parts, Starter And Drive Assembly - Ford Positive Engagement, Warning Indicator Panel - Console) | Automatic Transmission (External Parts - Shift Mechanism, External Parts - Steering Column And Shift Control Selector Mechanism, External Parts - Steering Column And Shift Mechanism, External Parts - Steering Column Shift Mechanism And Related Parts, External Parts - Steering Column Shift Mechanism And Related Parts - Fixed Wheel, External Parts - Steering Column Shift Mechanism And Related Parts - Tilt Wheel, Internal Parts - Case, Converter Assy., Extension, Pump And Related Parts, Internal Parts Related Parts - Clutches, Gear, Shaft, Rear Supports And Related Parts - Typical, Jatco Type Internal Parts - Case, Extension Housing And Converter, Jatco Type Internal Parts - Clutch And Planetary Gears Installation, Jatco Type Internal Parts - Converter Assy., Oil Pump Installation, Jatco Type Internal Parts - Low, Reverse And Governor Installation) | Body Front & Floor (Console, Illuminated Vanity Mirror, Instrument Panel, Sun Visor, Vanity Mirror And Rear View Mirror) | Body Sides & Quarter (Door Bumpers, Window Parts - Front Door) | Engine (Crankshaft And Flywheel, Cylinder Block - External Parts, Cylinder Block - Internal Parts, Cylinder Block Engine Assy., Cylinder Head, Valves & Related Parts, Engine Supports, Engine Supports Valves, Push Rods And Rocker Arm Cover) | Fenders & Hood (Hood) | Front Suspension & Steering (Steering Power Steering System - Hose And Pump Installation, Steering Power Steering System Cylinder Assy, Steering Power Steering System Steering Linkage - Control Valve Assembly.) | Fuel System & Manifolds (Emission System - Exhaust Gas - Recirculation (E.G.R.), Emission System - Exhaust Gas Recirculation (E.G.R.)- Exhaust Manifold And Related Parts, Fuel Filler Door Fuel System, Fuel Filler Door Intake Manifold And Related Parts) | IT Interior Trim Parts (Illuminated Vanity Mirror, Interior Trim Panels) | Lamps & Wiring (Lamps Convenience Lights, Lamps Dome Lamp, Lamps Dome/Map Lamp, Lamps Headlamp, Parking And Front Fender Side Marker, Lamps Rear Lamp, Backup And License Plate Lamp) | Radiator & Grill (Cooling System, Radiator Grille & Related Parts) | Rear Axle & Drive Shaft (Driveshaft) | Wheels & Brakes (Disc Brake System - Brake Assy. - Disc Front)