20 of the Fastest Muscle Cars Ever Built

November 30, 2016

1970 Buick GS Stage I

Quarter Mile Time: 13.38 Seconds

Hemmings

The Gran Sport came equipped with a powerful new 455 cubic inch engine that featured a highly touted 510-lb.ft. of torque. At the time Motor Trend took the Stage 1 to a quarter mile time of 13.38 seconds at 105.50 mph and noted that the factory rating was an understatement to say the least. That was a true testament to the power and speed of the GS Stage I.

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In the realm of muscle cars, Buick’s 455 is regarded as the most powerful engine in terms of torque output over the following 22 years.
The Stage 1 variant was slated to be accompanied by a standard heavy-duty, floor-shifted three-speed manual transmission. Not surprisingly, an overwhelming number of them were delivered with one of three options: the Turbo Hydra-Matic 400 automatic or wide- or close-ratio four-speed manual. Refer to the chart on page 34 for the internal ratios of each. all GS 455 Stage 1s built in 1970 were assembled at the Flint, Michigan, plant; look for the H designation in the VIN.

Key Features:

455-cu.in. V-8
Cast-aluminum pistons
Redesigned dual-snorkel air induction system
Rochester Quadrajet four-barrel carburetor
Floor-shifted three-speed manual transmission
112-inch wheelbase chassis
Hydraulic drum brakes
Turbo Hydra-Matic 400

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