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Muscle car

1967 Buick GS 400

Muscle car powered by 1967 Buick 400 four-barrel V8.

1967 Buick GS 400 convertible front view; visible wheels are not treated as factory-identity evidence
Model year 1967
Factory identity Buick GS-400 / Gran Sport 400
Engine 400 CID four-barrel V-8, 340 hp, 440 lb-ft
1967 400-4v production in reference table 13,813 across post coupe, hardtop, and convertible rows

Story

1967 Buick GS 400

Buick introduced the GS 400 for 1967 as the senior member of its Gran Sport line. Its new 400-cubic-inch V8 carried a four-barrel Rochester carburetor and factory ratings of 340 horsepower and 440 lb-ft. Buyers could choose a three-speed manual, a floor-shifted four-speed, or Buick's Super Turbine automatic.

The GS 400 came as a post coupe, hardtop, or convertible. Buick paired the drivetrain with firmer springs and shocks, a heavier stabilizer bar, finned aluminum front drums, 14-inch wheels, and F70-14 wide-oval tires; power front discs and Positive Traction were available. Standard Madrid-grain vinyl bench seats could be replaced by Strato buckets, with color choices varying by body style.

Reference tables report 13,813 GS 400 four-barrel cars: 1,014 post coupes, 10,659 hardtops, and 2,140 convertibles. A buyer should confirm the GS series and body style from the VIN, then compare the engine, transmission, axle, trim tag, and surviving paperwork. Hood scoops, stripes, and badges are useful restoration details, but they do not authenticate a car by themselves.

1967 Buick GS 400 convertible rear view; badges and wheels alone do not establish factory identityGreg Gjerdingen / Wikimedia Commons · CC BY 2.0

Price history

Values

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

Original Price

Market Observations

  • Price guide value $31,600

    Mar 12, 2026 · Hagerty Valuation Tools · Current guide point

    March 2026 #3 good-condition benchmark for the exact 1967 Buick GS 400 two-door convertible with the 400cid/340hp four-barrel V8. · unknown · good Hagerty reported $31,600 for the exact convertible configuration. This is an unadjusted guide value, not a completed transaction or individual-car authentication; the listed automatic-transmission adjustment is not applied.
    1967 Buick GS 400 convertible 400cid/340hp valuation report
  • Auction sale $38,000

    Dec 21, 2022 · Bring a Trailer

    GS 400 convertible 446677Z103255 with 400ci V8, Super Turbine automatic, older refurbishment, window sticker, original purchase order, and Protect-O-Plate. · restored · good Bring a Trailer records the $38,000 completed sale. The automatic transmission, older repaint, extensive convenience equipment, and surviving factory documents materially affect comparison.
    1967 Buick GS 400 Convertible 446677Z103255
  • Auction sale $49,340

    Jan 13, 2021 · Bring a Trailer

    GS 400 convertible 446677B110043 with 400ci V8, four-speed manual, factory Positraction, power front discs, and a cosmetic and mechanical refurbishment completed in 2014. · restored · excellent Bring a Trailer records the $49,340 completed sale. The four-speed, disc brakes, equipment, repaint, replacement top and interior work materially affect comparison.
    1967 Buick GS 400 Convertible 446677B110043

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 fully synchronized manual
  • Factory transmission 4-speed floor-shift manual
  • Factory transmission Super Turbine automatic

Options

Factory-rated 1967 Buick 400 four-barrel V8Classic Muscle · Reference illustration

Chassis

Authenticity

Standard and Positive Traction axle ratios by transmissionClassic Muscle · Reference illustration
  • VIN series/body identity VIN decoding must indicate GS 400 series and correct two-door body style before trim claims are accepted. · VIN plate on left front door hinge pillar; Team Buick also notes engine-block stamping. · fraud detection
  • Engine displacement claim The GS 400 used Buick's 400 CID four-barrel V8; engine-number and casting-date validation requires car-specific service and parts evidence. · Engine block stamping and supporting drivetrain documentation. · numbers matching
  • Engine production code A 1967 GS 400 engine-code check should find engine production code NR for the GS 400 400 CID, 340 hp, 4BC engine; production-date and original-to-car validation still require car-specific evidence. · Stamped on the right side of the engine block as part of the engine production code. · numbers matching

Still Researching

  • option packages Exact Buick sales option codes were not verified from a dealer data book or option-price sheet.
  • paint colors A paint-code reference was collected, but GS-400-specific applicability by body and stripe pairing was not normalized safely.
  • authenticity markers Engine production-code reference is partially resolved for the GS 400 NR code; transmission, rear-axle, trim tag, casting-date, and original-to-car validation markers still require service/parts references or car-specific documentation not normalized in the reviewed references.

Codes & names

Names & Engine Codes

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

Standard drum brakes and optional power front discsClassic Muscle · Reference illustration
400-cubic-inch, 340-horsepower V-8 1967 Buick 400 four-barrel V8
400 CID V-8 engine 1967 Buick 400 four-barrel V8
400-4v 1967 Buick 400 four-barrel V8
1967 Buick GS 400 1967 Buick 400 four-barrel V8

Photo and video gallery

Gallery

6 photos and videos

Factory literature

Video

Sources & Documentation

Reader contributions

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