I think we all forgot to mention the Buick Special 215 alloy-block V-8 from the early '60s...
Sadly, the only survivor in passenger use is the Small-Block Chevy. Ford, Cadillac, Dodge and Chrysler all use more recent V-8 designs with no link to the classic designs. Buick and Pontiac no longer have V-8s of their own, although the small-block Buick lives on in part in (and maybe in parts of...) the Buick 3800 V-6. Oldsmobile does not even exist anymore, much less have a V-8 of its own. The Rover Group no longer makes the Rover 3500 (formerly Buick Special 215). Sad, sad situation.