5. 1970 Buick GSX Stage 1
Buick’s entering the market for muscle cars brought with it the mightiest and most luxurious brands available. First obtainable for the 1970 Gran Sport 455, the GSX appearance package had left behind Buick’s conventional, more self-respected branding with body striping and rear spoiler. According to HowStuffWorks.com, out of the 687 GSXs that were created, roughly 488 of them had been ordered with the Stage 1 upgrade. Including the Wildcat and Rivier lines, Gran Sport initially appeared as a selection on the 1965 Skylark and became a distinct nameplate during 1967. By 1970 the Gran Sport was being powered by a V-8 motor that was 455 cubic inches. It also generated a significant 510 pounds-foot of torque. Those that had State 1 motor tweaks and tuning were able to deliver 360 horsepower over to the wheels at the rear. Although quicker competitors were present, the GSX was truly unique.