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Compact performance

1973 Dodge Dart Sport 340

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

1973 Dodge Dart Sport front three-quarter view showing the peaked grille, coupe profile, body stripe, and available hood scoops
Engine H-code 340 four-barrel LA V8
Factory rating 240 net hp
Transmissions D13 three-speed, D21 four-speed, or D34 TorqueFlite
Reported production 11,315 Dart Sport 340 coupes

Story

1973 Dodge Dart Sport 340

The Dart Sport replaced the Demon name for 1973, and the Dart Sport 340 carried Dodge's compact performance formula into the new model year. Its H-code 340 four-barrel LA V8 was rated at 240 net horsepower and paired with a floor-shifted three-speed manual, optional A833 four-speed, or optional TorqueFlite automatic.

Factory equipment gave the 340 model more than an engine badge. The dealer data book lists heavy-duty front and rear suspension with a front sway bar, power-assisted front-disc/rear-drum brakes, E70-14 tires, a body-side stripe, and 340 and Sport identification. Hood scoops, an up-and-over stripe, bucket seats, a console, sunroof, and folding rear seat were among the available choices.

The factory axle chart specifies a semi-floating hypoid rear axle with a 3.23 standard ratio. Sure-Grip could be ordered with 3.23 or 3.55 gearing across the documented three-speed, four-speed, and automatic paths. The cited production reference reports 11,315 Dart Sport 340 coupes; that total remains source-reported pending factory-ledger reconciliation.

Authentication starts with the LM29H3 VIN pattern and agreement among the fender tag, broadcast sheet, engine and transmission stampings, axle evidence, paint, trim, and options. A 340 badge, hood treatment, stripe, or later engine installation cannot establish original factory identity by itself.

1973 Dodge Dart Sport front view showing the 1973 grille, bumper, hood treatment, and body-side stripeGreg 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 $11,900

    Jul 28, 2026 · Hagerty Valuation Tools · Current guide point

    Current #3 good-condition guide benchmark for the exact 1973 Dart 340 Sport two-door coupe with the 340cid/240hp four-barrel engine. · unknown · good Hagerty showed $11,900 when accessed on 2026-07-28. This is an unadjusted guide value, not a completed transaction or evidence for a particular car's originality.
    1973 Dodge Dart 340 Sport 340cid/240hp 4bbl
  • High bid $5,250

    May 7, 2025 · PCARMARKET

    H-code 1973 Dart Sport with archive-rendered VIN LM29H38549629, seller-reported matching-numbers 340, four-speed, and comprehensive restoration with documented aftermarket equipment. · restored · good The reserve auction ended without a sale at a $5,250 final high bid. A later $10,000 offer shown by the archive is not substituted for the auction result.
    Restored 1973 Dodge Dart Sport 4-Speed LM29H38549629
  • Auction sale $28,600

    Jan 9, 2025 · Mecum Kissimmee 2025

    Auction example reported with 340 CI V-8, automatic, sunroof, non-stock ignition/headers and other changes; not used for factory specification claims. · modified · unknown
    1973 Dodge Dart Sport, Kissimmee 2025 lot
  • Auction sale $24,750

    Apr 4, 2013 · Mecum Houston 2013

    Factory H-code Dart 340 Sport LM29H3B242736 with a Tremec five-speed, 150-mph speedometer, aluminum radiator, factory air, power steering, and power brakes. · modified · unknown Mecum records the $24,750 completed sale. The non-factory five-speed and supporting changes make this a modified-car observation rather than a stock four-speed benchmark.
    1973 Dodge Dart Sport 340 LM29H3B242736

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

  • Carter four-bore down-draft climatic-control carburetor original carburetor number 6318S-SA · 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 applications; non-California row · carburetor / carburetor list
  • Carter four-bore down-draft climatic-control carburetor original carburetor number 6319S-SA · 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 applications; non-California row · carburetor / carburetor list
  • Carter four-bore down-draft climatic-control carburetor original carburetor number 6339S-SA · 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 California applications · carburetor / carburetor list
  • Carter four-bore down-draft climatic-control carburetor original carburetor number 6340S-SA · 1973 Dodge Dart 340 and listed Plymouth/Chrysler 340 California applications · carburetor / carburetor list

Transmission

  • Factory transmission D13 floor-shift three-speed manual
  • Factory transmission D21 A833 four-speed manual
  • Factory transmission D34 TorqueFlite automatic

Options

340 Four-Barrel reference for the 1973 Dodge Dart Sport 340Classic Muscle · Reference illustration
  • not-listed Manual sun roof optional · comfort · Available on Dart Sport and Dart 340 Sport; opens with crank above windshield.
  • not-listed Folding rear seat optional · interior · Available on Dart Sport and Dart 340 Sport; creates about 6.5 feet of cargo/stowage length; includes separate rear-seat trunk compartment floor carpeting.
  • not-listed Rear-window electric defogger optional · comfort · Dealer data book says electric rear window defogger is available for Dart Sport or Dart 340 Sport.
  • not-listed Air conditioning optional · comfort · Described in major options; exact engine/trim restrictions need order-guide follow-up.

Paint

1973 Dart Sport and 340 fender identification with body-side stripe detail; appearance remains supporting context rather than drivetrain proofGreg Gjerdingen via Wikimedia Commons · CC BY 2.0

Chassis

Authenticity

Factory Brakes reference for the 1973 Dodge Dart Sport 340Classic Muscle · Reference illustration
  • VIN engine code H = 340 CID 8 cylinder (1-4 bbl) · Position 5 of 13-character 1973 VIN · fraud detection
  • VIN carline/body style pattern L = Dodge Dart A-body; 29 = 2 Door Sports Hardtop · VIN positions 1 and 3-4 · trim correctness
  • Dart 340 Sport exterior identifiers 340 fender nameplate, Sport fender plaque, wheel-lip moldings, body-side tape stripe, E70 x 14 black sidewall tires · Exterior fenders, body sides, wheel openings, tires; confirm against fender tag/broadcast sheet for individual car · trim correctness
  • Engine serial-number displacement prefix and small-block V8 stamping location For 1972-73 Chrysler 318/340/360 V8 engines, the first three numerals of the engine serial number indicate cubic-inch displacement; the 318/340/360 V8 engine serial number is located on the left front of the block below the cylinder head. · Engine serial-number stamping on left front of engine block below cylinder head; compare the displacement prefix to the car's documented H-code 340 identity, but do not treat location or prefix alone as individual-car proof. · numbers matching

Still Researching

  • engine The H-code identity, headline specifications, and Carter 1973 340 carburetor list numbers are recorded, but complete casting, engine assembly, and date-code tables are not.
  • transmission D13, D21, and D34 availability is recorded, but complete application numbers and date windows are not.
  • rear axle The axle design and 3.23/3.55 paths are recorded, but complete assembly codes and date windows are not.
  • brakes Standard power front discs and rear drums are recorded, but component part numbers and production changes are not.
  • suspension Standard heavy-duty S13 suspension package components (including 0.870-inch torsion bars, 13/16-inch front sway bar, 6-leaf rear springs, and Firm-Ride shocks) are fully detailed with Mopar part numbers and specifications. Extremely rare or model-year-end option combinations (such as fleet or export-only parts) are not fully captured but do not affect standard Sport 340 authentication.
  • option packages Major comfort, cargo, appearance, and drivetrain choices are recorded, but the complete ordering and incompatibility matrix is not.
  • production The reported 11,315-car count is recorded, but a factory ledger and transmission or option breakdowns are not.
  • paint colors The 1973 Dodge palette is recorded, but Dart Sport 340 restrictions and stripe pairings require complete factory trim-book extraction.
  • trim and appearance Factory badges, stripes, moldings, tires, and hood choices are recorded, but every sales-code combination is not.
  • interior Seat, trim, folding-seat, console, and instrument-panel choices are recorded, but the complete trim-code and upholstery matrix is not.
  • authenticity markers VIN, exterior checks, and 1972-73 Chrysler 318/340/360 V8 engine serial-number displacement-prefix/location guidance are recorded, but exact body, axle, full engine assembly/date-code, and car-specific paperwork or inspection guidance remains incomplete.

Codes & names

Names & Engine Codes

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

Heavy-Duty Chassis reference for the 1973 Dodge Dart Sport 340Classic Muscle · Reference illustration
340 CID V-8 Chrysler 340 four-barrel LA V8
340 cu in V8 Chrysler 340 four-barrel LA V8
340 four-barrel Chrysler 340 four-barrel LA V8
E55 340 four-barrel Chrysler 340 four-barrel LA V8

Photo and video gallery

Gallery

5 photos and videos

Factory literature

Video

Sources & Documentation

Reader contributions

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