27-Years-Owned 1969 Buick Skylark GS 400 Stage 1 4-Speed Project

Description

The Buick GS 400 Stage 1, introduced in 1969, marked a pivotal moment for Buick’s performance lineup. Positioned as a refined alternative to the muscle car mainstream, the GS 400 combined understated styling with serious power. The Stage 1 performance package elevated the GS 400’s capabilities with a hotter camshaft, larger valves, and a revised carburetor—making it one of the most formidable sleepers of its era. With only 415 Stage 1-equipped hardtops produced in 1969, these cars remain highly sought after by enthusiasts.

Purchased by the seller in 1998, this Skylark GS 400 Stage 1 Hardtop project is finished in Frost Green (code 59) over a Parchment and Pearl interior and is powered by a correct 400ci V8 paired to a 4-speed manual transmission and 3.64 Positraction rear axle. The car features the Stage 1 performance package and aluminum front drum brakes, a hallmark of Buick engineering in the period.

The seller notes that the dashboard and dashboard pad have been refurbished, along with the speedometer cluster and bezel. The seller reports that all cluster lights, interior lamps, and turn signal bulbs have been replaced, and the headlight system has been serviced with new mounting hardware and brackets. Additional updates include a new cowl seal, refinished cowl area in satin black, new wiper hoses, solvent tank, and hardware.

With long-term Buick enthusiast ownership and a rare configuration, this 1969 Buick Skylark GS 400 Stage 1 is now offered with some spare parts, an owner's manual, and a clean Nebraska title in the seller’s name.

Highlights

• Non-running project

• One of 415 Buick GS 400 Stage 1 hardtops produced for 1969

• Under current ownership since 1998

• Finished in Frost Green paint over Parchment and Pearl interior

• Correct 400ci V8 with Stage 1 performance package

• 4-speed manual transmission and 3.64 Positraction rear axle

• The chassis number (446379H369396) decodes as:

  • 44 – Series: Buick GS 400

  • 63 – Body Style: 2-Door Hardtop Coupe

  • 79 – Model Year: 1969

  • H – Assembly Plant: Flint, Michigan

  • 369396 – Consecutive Unit Number

Factory Equipment

• Stage 1 Performance Package and optioned equipment:

  • Low-restriction dual exhaust system

  • Larger intake and exhaust valves

  • Performance-tuned suspension

  • Revised carburetor calibration

  • Aluminum front drum brakes

  • Available Ram Air induction

  • Special high-lift camshaft

  • Heavy-duty valve springs

  • High-capacity fuel pump

  • Tubular pushrods

  • Bucket seats

Servicing

From the seller: “This is a non-running project. I found the number eight exhaust valve pushrod bent because the lifter was sticking. I pulled all the lifters and pushrods at that time of inspection of motor. The engine looks good enough to rebuild, and all other parts are there for the car. I had sourced all of the missing interior parts as well. This is a great project given its completeness and rarity.”

Service work under current long-term ownership reportedly includes:

• Installed new cowl seal and refinished cowl area in satin black

• Replaced cluster lights, interior lamps, and turn signal bulbs

• Supplied used chrome grille surround and filler mounts

• Replaced headlight mounting fasteners and brackets

• New wiper hoses, solvent tank, and hose hangers

• Refurbished speedometer cluster and bezel

• Refurbished dash and dash pad

• Installed new bumper bolts

Known Imperfections

• Dent in passenger quarter panel behind door and ahead of rear wheel opening

• Rust on driver’s quarter panel behind rear wheel opening

• Rust present on front and rear suspension components

• Front clip requires alignment for proper panel gaps

• Rust spot at driver’s side rear window trim

• One headlight bulb currently inoperative

• Rust on left rear edge of deck lid

• Underbody undercoated

Ownership History

From the seller: “I purchased this GS 400 Stage 1 in October 1998 and have owned it ever since. It’s one of 415 Stage 1 Hardtops built in 1969. I also own a GS 400 convertible, so this car has been part of a dedicated Buick collection for decades. I’ve been a GS Club of America (member number 3553) member for 30 years—I'm a GS fanatic! This Stage 1 has been garage-kept for all 28 years I’ve owned it. While it does not run, this is a great project car.”

Included

• Owner’s manuals

• New door release handles, window cranks, washers, and fasteners

• Four new window cranks with washers and fasteners

• Used chrome grille surround and filler mounts

• Restoration-related hardware and spare parts

• New front armrests and pads and headliner

• New heating and cooling gasket kit

• Miscellaneous spare components

• New door release handles

• Rebuilt jack