The Immortal 409: A 1964 Impala SS Picture the roar of 425 horsepower trapped in a chrome-draped beast from the golden age of American muscle. It’s the 1964 Chevrolet Impala SS, standing proud at the Coombs Muscle and Hot Rod Show on Vancouver Island, where pre-’79 classics gather like legends at a reunion. This icon, powered by the legendary 409 cubic-inch V8, isn’t just a car—it’s a time machine. Introduced in ’61 as a performance package, by ’64 the Impala SS was its own series, blending slee