I am working on a 53 3100 that came to me as just chassis/ cab, so I need a complete bed. A guy near me has new 1/2 ton bed sides for 1946. Based on the research I've done, the only difference I can see from 46 to 47-up beds is that the width increased a smidge (from 48.5" to 50", if I remember right). Can anyone here confirm whether this is the only difference, and whether 46 bed sides would be useable on a 53 1/2 ton? I am fully willing to re-drill holes for the front panel if needed. Thanks!