This one was a concept car, since they weren't making La Salles in 1955. Named La Salle II Roadster
In his 2013 article, "GM's Road Not Taken", Robert Cumberford reviewed the restoration of GM's 1955 Motorama La Salle II Roadster. Cumberford likened the Roadster to a harbinger of GM's future. While the Roadster concept showcased important new technology, including an aluminum block, double overhead cam and fuel-injected V6, the technology went unrealized. GM instead emphasized styling over engineering advancement for the decades that followed and did not bring "an aluminum block, fuel-injected, overhead-cam V-6 into production until 2004".