Chevrolet has used the SS nameplate for the Impala on a few occasions. First time around, the Super Sport from the 1960s topped 425 horsepower from a 7.0-liter engine fed by a four-barrel carburetor.
LT1-powered Chevy Impala SS and Cadillac Fleetwood. If you had the money to buy just one, which would you have?
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