Ok, the Merc engine block table takes the cake.
My Grandfather made a mail box post out of an Oliver tractor straight 6 crank shaft.
this isn't vehicle part related, but a friend made this for me out of some .44 mag pistol cases (she called it the protection collection)
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and this is a lamp that used to be a clarinet (well still is, you can take it apart and play the instrument if you like)