Best Muscle Cars

1970 Buick GSX Stage 1 From Mecum

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By Dave Ashton

VIN: 446370H276890
Engine: 455ci./360 HP
Transmission: Turbo Hydra-Matic Automatic
Color: Saturn Yellow

Buick have always been renowned for their luxury and comfort, so why not produce a high-performance version which came in the form of the Gran Sport. The GSX was based on the Skylark with the GS 455 high performance package starting in 1970 as a $1,100 option. $115 got you the stage 1 option.

1970 only had two color options for the GSX of Saturn Yellow and Apollo White with only a black interior. This one which is coming up for auction at Mecum in Los Angeles, FEB 16-17 2018, LOT S139, is a numbers matching yellow version in tiptop condition. As you would expect from a entry at Mecum its in glorious condition, but what is lacking is any details about its back history and any documentation that comes with the car.

However, it does have all the distinctive features of a 1970 Buick GSX Stage 1, with the full body black stripe and rear spoiler. Standard on the car were the floor shifter, black bucket seats, anti-sway bars, quick ratio steering and and rear and quad-link suspension. This one has the options of automatic transmission and A/C.

The huge 455cu. V-8 was the standout feature with cast nodular-iron crankshaft, cast-aluminum pistons, forged-steel connecting rods. The stage 1 had 2.12/1.75-inch intake/exhaust valves with a more aggressive camshaft. The compression was also increased from 10.0:1 to 10.5:1. The mecum listing gives a horsepower rating of 360, while others say it could be closer to 395 hp and a possible 510-lb.ft. of torque. This Hemmings link gives you a full rundown of the car’s specs.

In prime condition this stage 1 could probably fetch around $130-$140k and stands as a prime example of the pinnacle from the classic era of muscle cars.

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