what is it and where does it go?

[ajherman]

my father and i are restoring a 1972 super cheyenne short box with a 402 bb and factory air. we got the truck after another guy had started a restoration. your basic basket case. i found a neat tag with some numbers stamped in it. it looks like it may go on the frame somewhere. we are restoring the truck to original and are replacing the chalk marks and such so would love to know where this tag goes. here is a picture of the tag:




any help is great! thanks.