A good example of buying a 70 Duster done rather than building one

You can match the core support number with the dash vin and match the number on the left rear speaker shelf. Do they match I don’t know. If I was interested in buying it I would surely check. But I’m not going to call the seller a liar. My crystal ball is broke.
Unless it a Canada Built car the its under the right fender and near the passenger side speaker.