Why do we think it’s legit and worth $55,000? Like Chevrolet's Impala "Super Sport," the validity of Ford's Galaxie 500 and 500 XL's muscle-car cred differs from one enthusiast to another.

This is what happened in 1967 when Ford's recipe worked like a charm. Models like the Mustang sold like hotcakes, while the Galaxie, which received another restyling for this model year ...