"In me is power. Churning power, turning power, burning power, in eight busy breathing cylinders! I am Chevrolet's new Turbo-Fire V8, an engine that keeps car wheels rolling!" Judging by the scenery-chewing hyperdramatic delivery of the narrator (coupled with war-movie background music) in this ad for Chevy's new-for-1955 overhead-valve 265, you'd think that GM felt their new engine design would turn out to be somewhat successful for them in the long run.
Jet Ace! Ramjet Fuel Injection For The '57 Chevy [internal]