In the 1960s and 1970s, General Motors was all over the muscle car movement. Chevrolet had the Chevelle Super Sport, Pontiac had the GTO, and Oldsmobile had the 4-4-2. Over at Buick, beginning in 1965, there was the Gran Sport. Though times changed in the early 1970s and muscle cars weren’t what they used to be, Buick still peddled the Gran Sport. This 1974 edition is the most potent with Stage 1 hardware. Located in Sykesville, Maryland, this near survivor is available here on Facebook Marketplace for $20,000. This tip is brought to us by Barn Finder “L.”

Rising insurance rates and growing emissions controls caused muscle cars to fall out of favor in the 1970s. But the Gran Sport soldiered on in 1973-74 with the new Colonnade platform. The GS was now based on the Century 2-door hardtop (previously it was the Skylark, which had been repositioned). The GS option included exterior identification and upgrades to the suspension. While the entry point was a 350 cubic inch V8, the Stage 1 editions employed a 455 with a 4-barrel carburetor, which was now rated at 270 hp SAE net.

In 1974, Gran Sport production was just 3,355 units, of which only 478 were Stage 1s, making the seller’s car a rare find after 51 years. This vehicle has an automatic transmission, which should be the TH-400 used by GM. The indicated mileage is 84,000, which suggests the car was not spared use but has also spent a lot of time in the garage. The seller’s photographs could be better, but we’re told the car is rust-free and has only been repainted once.

The bronze paint looks exceptional, and we assume the interior is okay, but more photos would be here. We’re told this Buick originated in South Carolina and found its way to Maryland, though we don’t know when. If you’re looking for a Gran Sport, this car would be one of the hardest to find, and its condition tells us it’s turnkey.