Which 1967 Chevrolet model offered the SS 427 performance package?

The 1967 Chevrolet model that offered the SS 427 performance package was the Chevrolet Impala. Chevrolet marketed the package as RPO Z24, and it was available on two-door Impala body styles.

The SS 427 combined the Impala’s full-size body with Chevrolet’s 427-cubic-inch Turbo-Jet V8, F41 heavy-duty sport suspension, redline tires, special badging, and other performance-oriented equipment. It was related to the Impala SS, but the SS 427 was the rarer, more powerful package rather than a package offered across Chevrolet’s full-size range.

The Biscayne, Bel Air, and Caprice were separate Chevrolet models and should not be substituted for the Impala in this question. Chevrolet did offer powerful engines and performance options in several full-size cars, which is one reason this era can create model-name confusion. The specific SS 427 package, however, belonged to the Impala line.

Only 2,124 of the 76,055 Impala SS models built for 1967 were ordered with RPO Z24. The package continued through 1969, when the 427 remained available in the final year of the Impala SS 427 before Chevrolet shifted its full-size big-block emphasis toward the 454.