1970 Dart "Hidden" VIN Where's it at??

On my 70 Darts, the stamping is on the core support, varying from center to the drivers side. None are stamped very deep and are hard to find due to paint, even on original paint cars. As for the trunk lip, I'm not sure, haven't looked for them. On the two Demons I've had, the rear stamp s always on the package tray and can be seen by crawling up in the trunk and reading the number from the bottom. It's near the speaker hole on the drivers side like everyone else here has said.