The Most Powerful Chevy Engines of the 1970sByDavid Castro|Share on FacebookShare on XShare on RedditCopy ArticleCHICAGO, 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)Share on FacebookShare on XShare on RedditCopy ArticlePrev4 of 10NextTyler 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 20201972 LS5 454ciThe 1972 LS5 454ci engine produced a factory-rated 270hp. Emission compliances were starting to really kick in now.NextHome/Cars