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  • CadillacLeMansAd@1953CAS.jpg
    An ad in the local newspapers annouced that the one-of-a-kind Cadillac Le Mans sports car would be displayed during the 1953 Chicago Auto Show, The Le Mans powertrain consisted of a beefed-up GM-built 331.1-cid V-8 and Hydra-Matic automatic transmission. This was decades before the production of the 1986-1993 Cadillac Allante or 2004-2009 Cadillac XLR two-seat convertibles.