OEM parts categories for 1980 Mercury Grand Marquis 8 Cyl 5 8L 3At C4: Accelerator Linkage, Air Cleaner & Speed Control (Accelerator Linkage, Accelerator Linkage Air Cleaner, Carburetor - Upper Body, Fuel Filler Door Fuel Vapor Canister And Related Parts, Speed Control And Related Parts - Production Installation - Passenger Compartment, Speed Control And Related Parts Accessory Installation, Speed Control And Related Parts Production Installation - Passenger Compartment - Engine Compartment) | Air Conditioner, Radios & Shock Absorbers (Ac Hoses & Tubes, Air Conditioner Compressor, Air Conditioner Compressor Installation, Air Conditioner Condenser & Dehydrator, Air Conditioner Controls And Ducts, Air Conditioner Engine Compartment, Air Conditioner Evaporator, Antenna And Related Parts, Citizen Band (C.B. Radio) And Related Parts, Heater - Engine Compartment, Heater - Hose Installation, Heater - Passenger Compartment, Heater & Controls, Heater Hoses & Tubes, Radio And Stereo - Am/Fm Stereo Tape Player, Am/Fm Multiplex Radio, Radio And Stereo - Radio Foot Control Switch, Radio And Stereo Am/Fm Multiplex Radio - Am/Fm Monaural Radio And Rear Speakers, Radio And Stereo Speakers) | Alternator, Regulator, Battery, Starter & Distributor (Alternator Mounting Brackets, Distributor, Instrument Cluster & Related Parts, Starter And Drive Assembly - Ford Positive Engagement) | Automatic Transmission (External Parts - Oil Cooling System, External Parts - Shift Mechanism, External Parts - Steering Column, 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 - Steering Column, External Parts - Steering Column Shift Mechanism And Related Parts - Tilt Wheel, External Parts - Steering Column Shift Mechanism And Related Parts - Transmission Bushings, External Parts - Transmission Shift Controls, Internal Parts - Case, Converter Assy., Extension, Pump And Related Parts, Internal Parts Related Parts - Clutches, Gear, Shaft, Rear Supports And Related Parts - Typical, Internal Parts Related Parts - Typical - Main Control Valve Body, Internal Parts Related Parts - Typical - Manual Control Linkage, Parking Pawl And Throttle, Internal Parts Throttle - Typical - Servo And Band (Front), Internal Parts Throttle - Typical - Servo And Band (Front) - (Rear), 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, Jatco Type Internal Parts - Main Control Valve Body Assy., Jatco Type Internal Parts - Parking Pawl And Manual Control Linkage) | Body Front & Floor (Illuminated Vanity Mirror And Related Parts, Instrument Panel, Sun Visor, Vanity Mirror And Rear View Mirror) | Body Sides & Quarter (Body Sides & Quarter, Body Types 54 And 74 - Electric - Body Types 54 And 74, Body Types 54 And 74 Body Types 54 And 74 (Rear Door) - Electric, Body Types 54 And 74 Body Types 54 And 74 (Rear Door) - Manual, Door Bumpers, Handles And Latch Parts - Front Door, Lock Cylinder Assy. - Anti-Theft & Illuminated Entry, Window Parts - Front Door) | EM Exterior Moulding (Back End) | Engine (Belt Tensioner, Belt Tensioner Camshaft, Gear And Bearings, Belt Tensioner Crankcase Ventilation System, Belt Tensioner Crankshaft And Flywheel, Belt Tensioner Cylinder Block - External, Belt Tensioner Cylinder Block - External - Internal, Belt Tensioner Cylinder Head, Valves And Related Parts, Belt Tensioner Engine Assy., Engine Supports, Engine Supports - Piston And Connecting Rod, Engine Supports Oil Cooler, Engine Supports Oil Filter (Spin-On Type), Engine Supports Oil Pump, Engine Supports Valves, Push Rods And Rocker Arm Cover) | Fenders & Hood (Hood) | Frame, Exhaust System, Spring & Stabilizer (Front Stabilizer, Rear Suspension - Air Leveler System) | Front Suspension & Steering (Front Suspension Arms, Shock Absorbers, Spindles, Springs And Stabilizer, Steering Power Steering System - Steering Column, Steering Power Steering System - Steering Gear Assembly, Steering Power Steering System - Steering Linkage, Steering Power Steering System - Steering Wheel, Steering Power Steering System -Pump Installation, Steering Power Steering System Pump Installation -Pump Assy) | Fuel System & Manifolds (8 Cyl. 5.8Lw (351 C.I.D.) - W (E.E.C. Iii), Electronic Engine Control, Emission System - Exhaust Gas - Recirculation (E.G.R.), Fuel Filler Door Fuel System, Fuel Filler Door In-Line Filter Installation, Fuel Filler Door Manifold And Related Parts, Fuel Filler Door Thermactor Emission) | IT Interior Trim Parts (Floor Insulators, Illuminated Vanity Mirror, Interior Trim Panels, Interior Trim Panels - L.H. Quarter Panel, Interior Trim Panels - R.H. Quarter Panel, Interior Trim Parts - Headlining & Garnish Moulding) | Lamps & Wiring (Electrical Systems - Electrical Wire Terminals, Electrical Systems - Fuse Panel, Electrical Systems - Tailgate Window - Regulator Wiring, Electrical Systems - Wire Connection Sleeve Kits, Electrical Systems - Wiring System, Electrical Systems - Wiring System - Instrument Panel, Lamps Cargo Lamp, Lamps Coach Pillar Lamp, Lamps Coach Pillar Lamp Courtesy Lamp - Door Trim Panel, Lamps Coach Pillar Lamp Dome Lamp, Lamps Coach Pillar Lamp Dome/Map Lamp, Lamps Headlamps, Parking, Cornering And Fender Side Marker Lamps, Lamps Headlamps, Parking, Cornering And Fender Side Marker Lamps Illuminated Entry System & Related Parts, Lamps Rear Lamp, Backup, License Plate And Body Side Marker, Steering Wheel And Horn) | Radiator & Grill (Cooling System, Radiator Grille & Related Parts, Water Pump) | Rear Axle & Drive Shaft (Driveshaft, Rear Axle - Ring Gear) | Roof, Back, Luggage Compartment & Tailgate (Fuel Filler Door, Latch Parts - Luggage Compartment, Latch Parts - Luggage Compartment - Wiring & Controls, Tailgate Parts - Handle And Latch, Tailgate Parts - Hinges, Tailgate Parts - Window Mechanism) | Seats (Auxiliary Seat, Storage Compartment And Related Parts - Latch Mechanism, Auxiliary Seat, Storage Compartment And Related Parts - Seat Parts, Child Safety Seat, Rear Seat Parts, Seat Belt And Shoulder Harness Installation) | SM Body Sheet metal (Lower Body, Upper Body) | Speedometer, Bumpers, Mirrors & Wipers (Bumper - Front, Bumper - Rear, Jack And Spare Wheel Parts, Mirror - Inside, Mirror - Vanity, Speedometer Cable, Windshield - Wiper And Washer) | Wheels & Brakes (Disc Brake System - Rear Drum, Disc Brake System - Rear Drum Brake Assy. - Disc Front, Disc Brake System - Rear Drum Brake Assy. - Drum Rear, Disc Brake System - Rear Drum Brake Assy. - Drum Rear Brake Cylinder Assy. - Rear Drum, Disc Brake System - Rear Drum Brake Booster Installation, Parking Brake System, Wheels Front Wheel And Related Parts, Wheels Hub Cap And Wheel Cover)