Thanks, credit for the work on my car goes to John (streetdreams both here and on the HAMB). I'm not sure if the front Xmember is same for '54 & '55 but I'm quite certain the '56 is not same as the '54. There have been vendors here, on the HAMB and on ebay that sell replacement crossmembers so a search for specific years may answer your question about interchangeabity.