Mar K has a pdf about putting a '54-'55.1 bed on an older frame and shows the different heights in the kick up portion of the frame.
It looks like there won't be an issue mounting an earlier bed on a later frame other than possible having to redrill the front bed mounting holes.
Liquidated my projects
Now looking for a decent '47-'55.1 3100, 3600, or 3800
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