1970 Plymouth Duster 340

Compact performance powered by Chrysler 340 four-barrel LA V8.

1970 Plymouth Duster 340 photographed by Greg Gjerdingen; exact Duster 340 exterior context and hero candidate.

Factory model Duster 340 2-door coupe

Engine 340 CID four-barrel LA V8, rated 275 hp and 340 lb-ft in reviewed references

Production 24,817 Duster 340 two-door coupes reported for 1970

Authenticity boundary Body identity, H-code 340 evidence, fender tag, broadcast sheet, drivetrain and axle records

Story

1970 Plymouth Duster 340

The 1970 Plymouth Duster 340 is the compact A-body Plymouth that put the 340 four-barrel small-block in a light, semi-fastback two-door coupe. This page treats the public target as the factory Duster 340 performance model, not a standard Duster, Gold Duster, later Duster 360, or modified 440 swap.

The source-backed boundary is straightforward: 1970 model year, Plymouth Duster body, 340 cubic-inch four-barrel LA V8, and Duster 340 regular equipment such as the special instrument panel, performance stripes, road wheels, high-rate torsion bars, heavy-duty rear springs and shocks, front anti-sway bar, disc brakes, and E70-14 raised-white-letter tires. Transmission records include the standard floor-shift three-speed manual, optional four-speed manual, and TorqueFlite automatic paths.

Production is recorded conservatively at 24,817 Duster 340 two-door coupes. Individual-car originality still needs decoded body identity, H-code 340 evidence, fender tag, broadcast sheet or comparable paperwork, and drivetrain/axle records that agree with the car. The gallery uses exact 1970 Duster 340 Commons media where available, general 1970 Duster context where clearly labeled, and source-card visuals for component details that should not be faked with unrelated transmission, axle, or engine photos.

**1970 Plymouth Valiant Duster 340 front three-quarter image; exact Duster 340 model context.**Greg Gjerdingen via Wikimedia Commons · CC BY 2.0

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 $29,500

Jul 28, 2026 · Hagerty Valuation Tools · Current guide point
Hagerty #3 Good value for a 1970 Plymouth Valiant Duster 340 two-door coupe with the 340cid/275hp four-barrel high-performance engine. · unknown · good This current guide value is for the exact body and engine configuration, not a completed transaction or a value for every transmission, documentation level, modification state, or individual car.
1970 Plymouth Valiant Duster 340 Valuation, July 2026
Auction sale $30,800

Jan 9, 2026 · Mecum Kissimmee
Four-speed H-code Duster 340 VS29H0B375106 with a recent restoration and matching-numbers engine and transmission claims. · restored · good Mecum records the completed result, exact H-code VIN, 340 and four-speed configuration, date, amount, recent restoration, and matching-numbers drivetrain claims. Good reflects the disclosed finished condition, not an independent inspection.
1970 Plymouth Duster 340 VS29H0B375106, Kissimmee 2026
Auction sale $40,800

Jun 27, 2025 · Bring a Trailer
H-code Duster 340 VS29H0B314594 with a replacement 340, fuel injection, Tremec six-speed, coilovers, and other disclosed modifications. · modified · good Bring a Trailer records the completed sale, exact H-code VIN, date, amount, replacement engine, non-factory transmission, and substantial disclosed modifications. It is classified as modified and is not a stock-condition benchmark.
Fuel-Injected 1970 Plymouth Duster 340 VS29H0B314594, June 2025
High bid $25,000

Aug 29, 2024 · Bring a Trailer
Automatic H-code Duster 340 VS29H0B313325 with E55/D32 tag decode, two-phase refurbishment, and aftermarket intake, exhaust, climate, and wheel equipment. · modified · good Bring a Trailer records the reserve-not-met high bid, exact H-code VIN and fender-tag decode, date, amount, automatic configuration, refurbishment, and modifications. This is the only observation retained for this repeatedly offered chassis.
1970 Plymouth Duster 340 VS29H0B313325, August 2024
Auction sale $77,000

Jan 13, 2023 · Mecum Kissimmee
Four-speed H-code Duster 340 VS29H0B194350 with a detailed restoration and matching-numbers transmission claim. · restored · excellent Mecum records the completed result, exact H-code VIN, 340/275-hp four-barrel and four-speed configuration, date, amount, 3.55 axle, restored interior, and matching-numbers transmission claim. Excellent reflects the extensive disclosed restoration, not an independent inspection.
1970 Plymouth Duster 340 VS29H0B194350, Kissimmee 2023
Auction sale $61,500

Oct 17, 2022 · Bring a Trailer
Four-speed H-code Duster 340 VS29H0B371505, refurbished in 2004 and accompanied by its broadcast sheet. · restored · good Bring a Trailer records the completed sale, exact H-code VIN, E55 340 and D21 four-speed fender-tag decode, date, amount, refurbishment, repaint, and broadcast sheet. Good reflects the disclosed finished condition, not an independent inspection.
1970 Plymouth Duster 340 4-Speed VS29H0B371505, October 2022

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.

Transmission

Factory transmission 3-speed manual floor shift
Factory transmission A833 4-speed manual
Factory transmission 727 TorqueFlite 3-speed automatic

Options

Engine source card for the 340 CID four-barrel LA V8 and factory rating.Classic Muscle · Reference illustration

Duster 340 Duster 340 performance model equipment standard · performance · Reviewed model record lists the 340 V8, floor-shift three-speed manual, special instrument panel, road wheels, performance stripes, heavy-duty suspension pieces, disc brakes, and E70-14 raised-white-letter tires as regular Duster 340 equipment.
D21 Four-speed manual floor shift optional · performance · The fact sheet notes the four-speed manual floor-shift transmission was only available in Duster 340.
D32 TorqueFlite automatic transmission optional · performance · Over-Drive lists TorqueFlite automatic availability and option pricing for V8 applications; Classic Industries identifies D32 as A727 TorqueFlite context.
E55 340 four-barrel V8 identity standard · performance · The Duster 340 included the 340 CID V8 in the base Duster 340 price; decoder context identifies E55 as 340 CID four-barrel V8.
Sure-Grip Sure-Grip positive traction rear axle optional · chassis · Sure-Grip is listed as an option and available in optional ratio paths where available.

Paint

1970 Plymouth Valiant Duster 340 rear-quarter image; useful for stripe and fastback coupe profile context.Greg Gjerdingen via Wikimedia Commons · CC BY 2.0

C Valiant Light Blue optional · solid
F Valiant Light Green optional · solid
A4 Silver optional · metallic
B3 Ice Blue optional · solid
B5 Blue Fire optional · metallic
B7 Jamaica Blue optional · metallic
F3 Frost Green optional · solid
F5 Limelight optional · solid
F8 Ivy Green optional · metallic
R4 Barracuda Orange optional · solid
R6 Scorch Red optional · solid
T5 Bronze Fire optional · metallic
W1 Alpine White optional · solid
X9 Black Velvet optional · solid
Y2 Sunfire Yellow optional · solid
Y4 Spanish Gold optional · metallic
999 Bahama Yellow / Orange / Rallye Green special-order paint context optional · other

Production

Drivetrain source card for standard three-speed, optional four-speed, TorqueFlite, axle-ratio and Sure-Grip context.Classic Muscle · Reference illustration

1970 Plymouth Duster 340 2-door coupe by body · 24,817 · reported
1970 Plymouth Duster 2-door coupe by body · 192,375 · reported

Authenticity

Chassis source card for Duster 340 suspension, brake, and tire records.Classic Muscle · Reference illustration

Model boundary 1970 Plymouth Duster 340 2-door coupe, not standard Duster, Gold Duster, later Duster 360, or modified 440 swap · VIN/body identity, fender tag, broadcast sheet, title history, and period paperwork · fraud detection
Engine identity H-code / E55-style 340 four-barrel evidence should agree with the car's documentation · VIN, fender tag, broadcast sheet, engine pad/casting evidence, and restoration records · numbers matching
Transmission and axle agreement Standard three-speed, optional four-speed, or TorqueFlite path plus 3.23/3.55/3.91 axle records should match the documented build · Broadcast sheet, fender tag, transmission stamping where available, axle tag, and restoration records · numbers matching
Photo boundary Duster 340 badges, stripes, or video claims are context unless tied to decoded paperwork for that exact car · Media captions, owner paperwork, decoded tags, broadcast sheet, and inspection records · fraud detection

Codes & names

Names & Engine Codes

Common names and codes are grouped so LS6 references point to the same engine, not separate pages.

Trim and interior source card for Duster 340 stripes, road wheels, callouts, and special instrument-panel context.Classic Muscle · Reference illustration

340 CID 4-Barrel V-8 Chrysler 340 four-barrel LA V8

340 CID V-8 Chrysler 340 four-barrel LA V8

340 cubic inch V-8 Chrysler 340 four-barrel LA V8

340 cu in V8 Chrysler 340 four-barrel LA V8

Plymouth 340 V8 Chrysler 340 four-barrel LA V8

Duster 340 engine Chrysler 340 four-barrel LA V8

Photo and video gallery