No. the Century is a small body and the Super is a big body. Many of the doors of 54,55 and 56 interchange but they have to be of the big or small series. did that make sense. a lot of Oldsmobile doors interchange with Buicks also.
there's lot of info on mid fifties interchangeable parts here
http://www.1954buick.de/cgi-bin/yabb...num=1258601794
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