The Most Powerful Chevy Engines of the 1970s

ByDavid Castro|

CHICAGO, IL - JULY 23: A Chevrolet emblem is displayed on the front of a dealership on July 23, 2014 in Chicago, Illinois. GM today announced the recall of another nearly 720,000 Chevrolet, Cadillac, Buick and GMC vehicles for various defects. (Photo by Scott Olson/Getty Images)

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Tyler Clark polishes a 1972 Chevelle SS at the Barrett-Jackson car auction at WestWorld in Scottsdale, Arizona, on Jan. 14, 2020.Barrett Jackson Car Auction 2020

1972 LS5 454ci

The 1972 LS5 454ci engine produced a factory-rated 270hp. Emission compliances were starting to really kick in now.