I do not know the answer to your question, but I know that the '52 through '54 seats are very similar, and the body's share several of the same parts.  the '55 and the'56 cars are a complete different animal than the '52-'54 models.  the '55-'56 models may interchange

I was hoping someone here might know if 1955 Fairlane seat upholstery/covers will fit 1954 Crestline seats. The local shops want a small fortune and Mac's only has '54 interior in green, but '55 in an assortment of color combos. Thanks for the help!