1968 Buick GS 400 Convertible Four-Speed

Description

OFFERED WITHOUT RESERVE

Hagerty Marketplace is honored to offer a selection of vehicles from the SugarCreek Collection. This private collection in southwestern Ohio is supported by its own in-house restoration and maintenance shop, with a full-time staff of craftsmen. The passion of one car enthusiast can be benefited by all to enjoy, as cars return to the road after extensive builds and care. The garage is a true spectrum of car enthusiast dreams, ranging from unfinished restorations to million-dollar builds, American muscle to European classic, drag racers to off-road machines. There is truly something for everyone in SugarCreek. 

This selection of vehicles is being offered by the SugarCreek collection without reserve. The 14 lots feature premium American classics, as well as wide assortment of European enthusiast cars. The two Buick convertibles will be participating in the 2025 Hot Rod Power Tour, traveling over 1,000 miles and will be available for public preview throughout the tour. 

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The Buick Gran Sport was launched following the tremendous success of its sister division’s Pontiac GTO, marking General Motors’ successful bid to balance luxury with performance. Part of Buick's record-breaking production year in 1968, the GS 400 featured a redesigned 112-inch wheelbase chassis and fresh styling that included the iconic sweepspear design and a faux “Venti Port” behind the front wheels. The GS 400's 400-cubic-inch V8, which replaced the previous “nailhead” engine, delivered 340 horsepower and 440 lb-ft of torque through either a floor-shifted three-speed manual, Muncie four-speed, or automatic transmission.  

Despite its performance credentials, the GS 400 maintained Buick's luxury reputation with plush interiors featuring standard vinyl bench seats or optional buckets, along with available amenities like power accessories, air conditioning, and various console options. The convertible variant proved particularly uncommon in 1968, with just 2,454 examples produced. With its blend of power and sophistication, the GS 400 Convertible represented one of the last icons of the muscle car era, with production concluding in 1972. And this Buick will be one of two participating in the 2025 Hot Rod Power Tour. 

Highlights 

• Offered from The SugarCreek Collection  

• Replacement 400 cu-in V8 was reportedly installed circa 2012, and is equipped with an electric radiator fan   

• Four-speed manual transmission  

• Refurbished to its factory Ivory Gold Mist and Black vinyl finishes in 2012  

• 15-inch Rallye wheels mounted with 225/70 BFGoodrich Radial T/A tires  

• The chassis number (446678H141528) decodes as follows:  

  • 4 – Buick  

  • 46 – GS 400  

  • 67 – Convertible  

  • 8 – 1968  

  • H – Flint, Michigan assembly plant  

  • 141528 – Production number  

• The Body by Fisher tag decodes as follows:   

  • 10A – First week of October production  

  • 68-44667 – 1968 GS 400 convertible  

  • FL1 49266 – Flint, Michigan, production, body number  

  • 158 – Black vinyl trim  

  • G-2 – Ivory Gold Mist paint, Black soft top 

Features 

• Recent maintenance by the SugarCreek shop includes: 

  • Four new BFGoodrich Radial T/A tires 

  • New front wheel bearings and seals 

  • Repainted the GS emblem on the grille 

  • Fixed parking light issue 

  • Replaced rocker arm shaft 

  • Replaced pinion seal 

  • New rocker arms 

  • New pushrods 

  • New thermostat 

  • New radiator cap 

  • New upper radiator hose 

  • Rebuild the Carburetor  

  • New windshield washer pump 

  • Oil change, fluids checked, greased, etc. 

  • Flowmaster mufflers with crossover pipe  

  • Custom AutoSound AM/FM radio  

  • AutoMeter auxiliary gauges  

  • Power-assisted front disc brake conversion 

  • Power-operated black convertible top 

Known Imperfections 

• Cracks in upper corners of trunk 

• A list of other imperfections is in the Additional Documents section below

Included 

• Two keys  

• Custom AutoSound radio manual  

Ownership History 

This 1968 Buick GS 400 Convertible Four-Speed reportedly joined The SugarCreek Collection in 2007 prior to undergoing a refurbishment to its current Ivory Gold Mist and Black vinyl finishes in 2012. 

Additional Notes 

A Broad Arrow Auctions Specialist is working as an agent on behalf of the owner of this vehicle. Broad Arrow Auctions is a wholly owned subsidiary of Hagerty. 

Contact: Matt Lowney   Phone: 623.308.2640   email: mlowney@hagerty.com