 In 1967, when Chevrolet began selling the Camaro, Yenko began to modify SS Camaros by replacing the original L-78 396 in³ (6.5 L) engine with a Chevrolet Corvette's L-72 427 in³ (7.0 L) and upgrade the rear axle and suspensions.He also modified other Chevrolet vehicles like Chevelle and Nova by fitting them with L-72 engines.This limited series of cars sometimes began to take the name "sYc" (standing for Yenko Super Car), after the graphics found on the hoods and seat rests.