the K-Body designation over the Nova's then-X-Body. At $12,479, the Seville was the highest-priced Caddy of 1975. Buick/Olds/Pontiac also had their versions, namely the Buick Apollo , Oldsmobile Omega (shown here), and Pontiac Ventura (later the Phoenix , years before the front-wheel-drive X-Car with the same name). Yes, they were virtual