en.wikipedia.org/wiki/Chevrolet_Camaro_(first_generation)

The Yenko Super Camaro was a modified Chevrolet Camaro prepared by Yenko Chevrolet, developed by the dealership owner and racer, Don Yenko.

When the Camaro debuted, a General Motors corporate edict prevented it from carrying an engine larger than 400 in³ (6.6 L) V8. This put the Camaro at a disadvantage to the Ford Mustang, Plymouth Barracuda and the Dodge Dart since neither Ford nor Plymouth/Dodge had such a limit (although Ford only had a 390 Mustang in 1967). Don Yenko and others knew there was a market for a more powerful Camaro and found ways around the GM limit.

For 1969, the dealership worked with Chevrolet to have the L72 engines installed on the factory assembly line using a Central Office Production Order, or COPO. The orders included power disc brakes, spoilers, cowl-induction hood, a 4.10 Positraction rear end with gears that were heat treated for strength, a bigger front sway bar, and a heavy-duty 4-core radiator. Buyers of the car had the option of either the M-21 four speed or the Turbo Hydramatic 400 automatic transmission. A total of 201 cars were sold in 1969, 171 with four speed transmissions and 30 with automatic transmissions. Yenko rounded out the visual package with special "Yenko 427" badges, stripes down the sides and hood, and the sYc (Yenko Super Car) on the headrests. According to the Camaro Research Group, standard black interior (code 711) was the only interior ordered by Yenko in 69.

Eldorado, Kansas Car Show, Sep 2014