1974 AMC Javelin AMX 401

Pony car powered by AMC 401 V8.

All-stock black 1974 AMC Javelin AMX 401 four-speed

Body Four-seat Javelin AMX hardtop on a 110-inch wheelbase

Engine 401 four-barrel V8, rated at 235 net hp and 335 lb-ft

Transmissions T-10 four-speed or Torque-Command A727 automatic

AMX 401 production 776 reported for 1974

Story

1974 AMC Javelin AMX 401

The 1974 Javelin AMX was the last factory performance version of AMC's four-seat Javelin. The optional 401 Go Package paired AMC's largest V8 with the AMX body and was rated at 235 SAE net horsepower and 335 lb-ft of torque. Buyers could choose a Hurst-shifted Borg-Warner T-10 four-speed or the heavy-duty Torque-Command A727 three-speed automatic.

The final-year Go Package included the 401 four-barrel and dual exhaust, hood T-stripe, black rear panel, Rally-Pac instruments, heavy-duty cooling, handling package, Twin-Grip differential, power-assisted front discs, E60-15 raised-white-letter tires, 15-inch slot-style wheels, and a space-saver spare. Unlike the 1973 package, it did not include the functional cowl-induction hood. Front disc brakes, the mesh AMX grille, rear spoiler, engine-turned dash panel, high-back buckets, and 14-inch slot-style wheels were already standard AMX equipment.

AMC offered fifteen Javelin colors for 1974, with vinyl or optional vinyl-and-domino-cloth bucket-seat upholstery. The Pierre Cardin interior ended after 1973 and is not a 1974 factory path. American Motors built 27,696 Javelins for the final model year, including 4,980 AMXs; Hemmings reports that 776 of those AMXs carried the 401.

For an individual car, the 7479-8 AMX model code, Z-code 401 VIN evidence, engine tag and casting dates, transmission identity, axle tag, door-tag paint and trim codes, build sheet, window sticker, and original paperwork should agree. Stripes, spoilers, wheels, badges, or an installed 401 do not establish an original 401 Go Package by themselves.

**All-stock 1974 AMC Javelin AMX 401 four-speed rear view**Christopher Ziemnowicz via Wikimedia Commons · CC BY 4.0

Price history

Values

Nominal dollars from original price sheets, auction archives, and approved value references.

Original Price

A verified original price is not yet available for this car.

Market Observations

Price guide value $35,700

Jul 28, 2026 · Hagerty Valuation Tools · Current guide point
Current #3 good-condition guide benchmark for the exact 1974 Javelin AMX fastback with the 401cid/235hp four-barrel engine. · unknown · good Hagerty showed $35,700 when accessed on 2026-07-28. This is an unadjusted guide value, not a completed transaction or proof of a particular car's originality.
1974 American Motors Javelin AMX 401cid/235hp
Auction sale $27,500

Oct 29, 2025 · Mecum Dallas/Fort Worth
Z-code Javelin AMX A4C798Z496977 with a 401, automatic transmission, and extensive drivetrain, interior, steering, suspension, brake, glass, seal, and tire renewal. · restored · good Mecum records the $27,500 completed sale. The rebuilt engine, transmission, and rear axle plus broad renewal make this a restored-car observation.
1974 AMC Javelin AMX 401 A4C798Z496977
Auction sale $19,200

May 27, 2024 · Bring a Trailer
Z-code Javelin AMX A4C798Z278525 with a 401, automatic transmission, service records, and highly original classification. · survivor · good Bring a Trailer records the $19,200 completed sale. Suspension, gauges, carburetor, ignition, brake, and shifter work remain disclosed; the same chassis's 2020 BaT and July 2024 Mecum results are excluded as repeats.
1974 AMC Javelin AMX 401 A4C798Z278525

Values move with paperwork, originality, options, condition, venue, and body style. High bids and guide values are labeled separately from completed sales.

Reference records

Options, Colors & Components

Source-backed details for trim, chassis, production, and authenticity.

Engine Details

**All-stock 1974 AMC Javelin AMX 401 four-speed engine bay**Christopher Ziemnowicz via Wikimedia Commons · CC BY 4.0

Motorcraft four-barrel carburetor number for 401 1-4V emissions certification 4TA4 · 1974 American Motors 401 CID 1-4V engine family IV, including Javelin light-duty vehicle certification · carburetor / carburetor list
Delco distributor number for 401 1-4V emissions certification 1112215 · 1974 American Motors 401 CID 1-4V engine family IV, including Javelin light-duty vehicle certification · distributor / part number
Emission-control equipment listed for 401 1-4V certification AIR, TCS, EGR, EGR-COS, Sp.-COS · 1974 American Motors 401 CID 1-4V engine family IV California certification · other / specification
Certification tune-up timing specification for Javelin 401 1-4V 5 BTDC at 700 RPM Drive · 1974 Javelin with 401 CID 1-4V engine in California ARB Executive Order A-17-3 tune-up specifications · ignition / specification

Transmission

Factory transmission AMC Borg-Warner T-10 four-speed manual
Factory transmission AMC Torque-Command A727 three-speed automatic

Options

AMC 401 V8 reference for the 1974 AMC Javelin AMX 401Classic Muscle · Reference illustration

AMX Javelin AMX performance model factory · performance · The four-seat Javelin AMX was the performance version of the Javelin, not the earlier separate two-seat AMX.
Z 401 CID four-barrel V8 optional · performance · Top engine branch and subject of this page; Z-code engine evidence remains separate from Go Package proof.
Go 401 1974 Javelin AMX 401 Go Package optional · performance · Included the 401, dual exhaust, Rally-Pac, cooling, handling, Twin-Grip, power front discs, 15-inch wheels and tires, T-stripe, and black rear panel, but no functional cowl induction.

Paint

A1 Snow White factory · solid
P1 Classic Black factory · solid
E9 Mellow Yellow factory · solid
D7 Trans-Am Red factory · solid
E6 Fawn Beige factory · solid
F8 Golden Tan factory · metallic
G6 Sienna Orange factory · solid
F9 Copper factory · metallic
G1 Silver Green factory · metallic
G2 Medium Green factory · metallic
G3 Dark Green factory · metallic
F2 Maxi Blue factory · solid
E1 Diamond Blue factory · metallic
F7 Dark Blue factory · metallic
G4 Plum factory · metallic

Production

Transmission Records reference for the 1974 AMC Javelin AMX 401Classic Muscle · Reference illustration

1974 AMC Javelin, all models and engines total · 27,696 · documented
1974 AMC Javelin AMX, all engines by body · 4,980 · documented
1974 AMC Javelin AMX with 401 V8 by engine · 776 · documented

Authenticity

AMC Model 20 Axle reference for the 1974 AMC Javelin AMX 401Classic Muscle · Reference illustration

Javelin AMX identity 7479-8 model/body evidence, mesh grille, rear spoiler, engine-turned trim, and records agree · VIN/body code, door tag, grille, spoiler, dash, build sheet, window sticker · fraud detection
401 engine identity Z engine code and 401 tag, casting, date, and paperwork evidence agree · VIN, engine tag and castings, build sheet, window sticker · numbers matching
Transmission path T-10 four-speed or Torque-Command A727 automatic matching tags, controls, and paperwork · Transmission tag or case, shifter, linkage, console, build records · date correctness
1974 Go Package evidence Powertrain, exhaust, gauges, cooling, suspension, brakes, Twin-Grip, wheels, tires, stripe, and rear panel agree with records; no functional cowl induction · Build sheet, window sticker, hood, brakes, axle, suspension, cooling system · trim correctness
Paint and interior Door-tag paint and trim codes agree with original layers, upholstery, and paperwork · Door tag, hidden paint areas, seat and door trim, build records · trim correctness
AMC V-8 original-engine limitation 401 block displacement casting and valve-cover tag or casting-date evidence identify engine family and build timing, but AMC V-8s do not provide a car-specific engine number that directly proves original installation in one vehicle. · Block displacement castings near the engine-mount area, valve-cover engine tag, casting numbers and dates, build sheet, window sticker, original service or ownership records · numbers matching

Still Researching

engine The 401 rating, dimensions, compression, carburetion, and dual-exhaust path are recorded, and CARB Executive Order A-17-3 now narrows the 1974 401 1-4V certification carburetor number, distributor number, emissions-control equipment, and tune-up timing line; every engine tag, casting, carburetor/date-code variation, emissions calibration, ignition variation, and car-specific original-equipment inspection remains unresolved.
transmission T-10 and Torque-Command A727 paths are recorded, but the complete tag, case, gearset, shifter, and date-code matrix is not.
rear axle Twin-Grip and the 3.15 automatic or 3.54 four-speed paths are recorded, but the complete axle-tag and option restriction matrix is not.
brakes Standard 11.2-inch front discs, rear drums, and Go Package power assist are recorded, but every casting, line, valve, and package interaction is not.
suspension The independent front, leaf-spring rear, and Go Package handling paths are recorded, but every spring, shock, bar, and steering part number is not.
option packages AMX, 401, and Go Package boundaries are recorded, but the full option-code, restriction, combination, and price matrix is not.
production Javelin, AMX, and AMX 401 totals are recorded, but transmission, package, paint, and interior splits are unavailable.
paint colors The 15-color Javelin palette is recorded, but special-order finishes and color production totals are not.
trim and appearance Major AMX and Go Package appearance paths are recorded, but every stripe, roof, wheel, molding, bumper, and accessory combination is not.
interior Vinyl, domino-cloth, engine-turned trim, Rally-Pac, and console paths are recorded, but every trim code and exterior-color compatibility combination is not.
authenticity markers Core AMX, engine, transmission, paint, and package checks are recorded, and engine-family/date evidence is narrowed by AMC V-8 displacement casting and valve-cover tag guidance plus the limitation that AMC V-8s lack a car-specific original-engine number; complete component-date, assembly-number, and car-specific paperwork guidance remains unresolved.