 Subsequent engine design would be accomplished by one central office with all designs being shared by each brand.For model year 1977, the full sized Pontiacs received the same "downsizing" as GM's other "B" body cars.The new Bonnevilles and Catalinas continued to be best-sellers, although their styling similarity to the Chevrolet Caprice was seen by some buyers as a "cheapening" of Pontiac's image.