For sale at auction: Lot #379.1 - Restored 1970 Buick GS Stage 1 convertible. Sherwood Green paint with a white top and white interior make this Buick GS one sharp looking automobile. Power steering, power brakes and the automatic transmission make this a comfortable car to drive. The Stage 1 was rated at 360hp and a stump-pulling 510lb/ft of torque. Only 1,416 1970 GS convertibles were produced. The Stage 1 option consisted of a more aggressive camshaft, higher compression, unique cylinder heads, unique 4-barrel carburetor, more aggressive ignition timing, 5/8" oil pickup tube, low restriction dual exhaust and a higher numerical final drive.