1970 Buick GS 455 Convertible

The Gran Sport (GS) name has been used on several high-performance cars built by General Motors for its Buick brand since 1965. In the GM brands hierarchy, Buick was surpassed in luxury and comfort appointments only by Cadillac, which did not produce performance models. As a result, the Buick GS series were the most opulently equipped GM sport models of their era.

Disputed performance accolades aside, there was an undisputed truth about the GS that everyone could agree on. When it came to Luxury and Comfort in the GM lineup, Buick was surpassed only by Cadillac who didn’t make performance models at the time, and the automaker did not hold back when putting together the muscle car’s interior. Starting in 1970, Buick proved that you could have the very best in luxuries and all the power of a muscle car.

Factory rated at 360 HP and 510 lb-ft of torque, the Stage 1-specification Ram Air-fed 455 CI V-8 is part of a package that includes a Positraction rear end, heavy-duty cooling, Rallye Ride suspension, power steering and power front disc brakes and, in this case, a 4-speed manual transmission, one of only 67 installed in 1970 Stage 1 convertibles and one of just 19 known to exist today.

The cabin features front bucket seats and a rear bench upholstered in black vinyl joined by a matching dashboard, door panels, and carpets.  Equipment includes a custom center console, heater, wind-up windows, a remote driver-side mirror, and embroidered floor mats. The wood-rimmed steering wheel frames a 120-mph speedometer, 6k-rpm tachometer, and a fuel gauge.

According to a ConceptCarz vehicle evaluation analysis based on auction results and sales data, the 1970 Buick Gran Sport 455 has a current average sale value of $67,833 in used car listings. The analysis showed that between $58,000 and $184,000 were paid for a perfect condition 1970 GS455 that still is a used car.