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Close 615704 is one I was thinking of.
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No need to go crawling into holes.
I believe that 615704 is indeed a rebody, apparently performed as a collision repair a loooong time ago. I believe the body used to replace it was originally a frost green car? I forget the entire story on it. The vin is for a fathom green, a/t, p/s, v/t Yenko Camaro from Hult Chev. If you've seen the video tape from it's maiden show, you'll remember this quote: "My name is so-n-so, '69 Yenko, fully restored it, and I'm here hoping to win"! Classic, should have said: "... '69 Yenko vin plate and trim tag....".
I am not aware that vin #615356 is owned by anyone, but have heard that the body was laying in a ditch - tagless

If you've got more facts, share 'em!