This 1970 Buick GS Stage 1 was built on March 17th and sold to the new owner by Riley Motor Company in Sheridan, Wyoming on April 4th 1970 which was shortly after General Motors management dropped the corporate mandate of limiting the displacement in its intermediate models to 400 CI. As luck would have it the Buick engineers had the perfect engine already worked up in the full-size models; the freshly minted 455 CI V-8, which promised enormous potential. In 1970 the GS tune on the 455 included a moderate cam, large valves and a redesigned dual-intake cold-air induction system which was introduced and underrated at 350 HP. The Stage 1 performance package boosted compression from 10.0:1 to 10.5:1 and subbed a more aggressive cam, stiffer valve springs and ported and polished heads with larger valves for a mere $199.05 more. With that, the factory stated an increase of just 10 HP, but any person who drove this car knew the HP increase was much greater! Whatever the actual number, with the exception of Cadillac’s 500 CI V-8, the Buick GS Stage 1 delivered the most torque of any American production car in 1970. This GS Stage 1 is wearing understated Burnished Saddle paint and interior with a black vinyl roof. It is a matching-numbers Stage 1 with a “SS” stamped 455 engine mated to a Turbo 400 “BB” stamped automatic transmission sending power to the “OO” stamped case with factory ordered Posi-traction. Optioned with power steering and disc brakes, A/C, the Sonomatic Stereo and tape player, remote mirror, full-length center console on Buick factory 15x7-inch sport wheels this car is loaded up from the factory. This amazing and beautiful Stage 1 coupe is fully documented with the original window sticker, build sheet, Protect-O-Plate and the original Bill of Sale.