The Chevrolet Chevelle is a mid-sized automobile produced from 1964 through 1977. The Chevelle was one of Chevrolet's most successful nameplates. Body styles include coupes, sedans, convertibles and station wagons. Super Sport versions were produced through the 1973 model year, and Lagunas from 1973 through 1976. The Chevelle SS represented Chevrolet's entry into the muscle car battle.
1969 Chevelles were billed as "America's most popular mid-size car." They showed only minor changes for 1969, led by revised front-end styling. A single chrome bar connected quad headlights, and a slotted bumper held the parking lights. Taillight lenses were larger and more vertical, flowing into the quarter panels. Front vent windows began to fade away now that Astro Ventilation was sending outside air into several Chevelle models.
Retired race car driver Don Yenko, developed his own line of signature Chevelles, along with his own models of Camaros and Novas, which became the Yenko Super Cars. At the time, the largest engine being installed in Chevelle SS's was the 396 cid V8. Yenko decided to equip his acquired models with the Chevrolet 427 cid V8. While being an extremely limited edition of Chevelles, they nonetheless proved very popular among Chevy lovers across the country. Today at auction, the Yenko Super Cars can bring as much as $2.2 million. Prior to 1970, GM had a restriction stating no mid-size car could have an engine with a displacement over 400 cu in (6.6 L). Don Yenko discovered a way to get around that edict. Don used the Central Office Production Order system, which normally filled special-equipment fleet orders, to create a special COPO that included the L72 427 cubic inch 425 hp (317 kW) engine and the needed drive train upgrades. A few other dealers ordered the package Yenko created and sold them as their own supercars.