For instance: I grew up in the car theft capitol of the country - south Chicago. It was not unheard of cars disappearing, yet, it seems a certain auto wrecking yard always had engines, transmissions, and other parts, but never the chassis that carried it. The rumors always had it that they cars chassis were torched up into little pieces and put into the scrap bin.
I believe 939 either dissappeared this way OR it is sitting somewhere unknown to anybody with one of those crotchity old farts sitting around waiting because....I'm gonna fix it up someday.
I do imagine though, with a good front end wreck the car might have been front - halved, so, proof will be hard to come by. Another possibility is it is running around on the Fomoco vin. Out of country, Canada or Mexico.