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In page Buick Riviera:

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The Riviera was radically redesigned for the 1971 model year with flowing and dramatic "boat-tail" styling.[2] Designed under Bill Mitchell's direction, it was penned by Jerry Hirshberg, future head of design for Nissan, mating the two-piece vee-butted[3]:792 fastback rear window, inspired by the 1963 Corvette Sting Ray split window coupe, to the Riviera's platform.