39,512 miles
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Route 61 Classics in Pennsylvania is proud to offer this 1968 Buick GS400 Convertible for sale, a striking muscle-era convertible that combines timeless styling with professionally built Buick big-block performance. Finished in Scarlet Red with a black power convertible top and black interior, this GS400 presents beautifully and commands attention wherever it goes. Under the hood is a 455ci Buick V8, using a correctly disclosed 1970-71 Buick block (casting 1238861). The engine was professionally built with performance and reliability in mind, featuring TA Performance Stage 1 Street Eliminator aluminum heads, Wiseco .040-over forged pistons, ARP fasteners, MLS head gaskets, upgraded valvetrain components, and a performance camshaft. Induction is handled by an aluminum intake manifold topped with a Holley 750 CFM vacuum-secondary carburetor (LIST-3310-3), while ignition duties are managed by an MSD distributor. This combination produces a dyno-verified 428 horsepower and 468 lb-ft of torque, with documentation included - delivering strong street manners, massive torque, and the unmistakable sound Buick big-blocks are known for. Cooling is handled by an aluminum radiator with dual electric fans, and exhaust exits through TA Performance headers feeding a deep-sounding dual exhaust system. Power is sent through a Muncie 4-speed manual transmission to a Buick-specific 8.2 BOP 10-bolt rear axle, preserving the authentic muscle-era driving experience. The suspension remains true to its GM A-body roots, complemented by factory power front disc brakes for confident stopping. This GS400 comes with a binder of receipts and documentation, along with an extensive trophy history from shows and events - a clear reflection of the quality of the build and the pride of ownership. The undercarriage is clean and solid, and the car runs strong, drives well, and presents as a true enthusiast-owned example. If you're searching for a 1968 Buick GS400 Convertible with a 455 V8, 4-speed manual, documented performance, and show-quality presence, this is a standout opportunity. Available now from Route 61 Classics in Orwigsburg, Pennsylvania.
| Monday | Closed |
| Tuesday | 9:00 am - 5:00 pm |
| Wednesday | 9:00 am - 5:00 pm |
| Thursday | 9:00 am - 5:00 pm |
| Friday | 9:00 am - 5:00 pm |
| Saturday | 10:00 am - 2:00 pm |
| Sunday | Closed |
This vehicle may have an open safety recall. Head to the National Highway Traffic Safety Administration (NHTSA) website to perform a quick search.
Some vehicles may be subject to manufacturer safety recalls. See if there are any open safety recalls for this vehicle. This does not include non-safety recalls. Recently announced safety recalls may not yet be posted and there may be a delay between the time a repair is made and before it is reported or posted to the website. Before purchasing, be sure to ask the dealer for an up-to-date status on any recalls.
| Monday | Closed |
| Tuesday | 9:00 am - 5:00 pm |
| Wednesday | 9:00 am - 5:00 pm |
| Thursday | 9:00 am - 5:00 pm |
| Friday | 9:00 am - 5:00 pm |
| Saturday | 10:00 am - 2:00 pm |
| Sunday | Closed |
39,512 miles
