The Most Powerful Chevy Engines of the 1970s

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)
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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MARKT PIESTING, AUSTRIA – SEPTEMBER 2: 1974 Chevrolet Corvette in the ‘6th Ebreichsdorf-Classic’ oldtimer rally at Markt Piesting on September 2, 2017 in Markt Piesting, Austria. (Manfred Schmid/Getty Images)
MARKT PIESTING, AUSTRIA – SEPTEMBER 2: 1974 Chevrolet Corvette in the ‘6th Ebreichsdorf-Classic’ oldtimer rally at Markt Piesting on September 2, 2017 in Markt Piesting, Austria. (Manfred Schmid/Getty Images) /

1974 LS4 454ci

For 1974 the LS4 produced only 270hp. The glory days of Chevy horsepower were gone.