My '71 ain't a '71...or is it?

70 up the body sequence number on dusters ended up being stamped in the rear package tray sheetmetal. Not sure if they did that with darts starting in 1970.

Vin partial on radiator support is on the top of the support, drivers side, under an antifreeze instructions decal.

I am more familiar with the duster/demon locations (so package tray VIN may not apply to the scamp), and moparmat2000 is correct about VIN partial being stamped on rear package tray.....it is usually found around the lip of the drivers side speaker hole.

To OP:
Pic to illustrate where to look for VIN partial on rad support (can be stamped anywhere from middle to far right, but is usually in circled area). Usually on top lip area.
Last numbers from VIN have to match dash/fender tag/rad support/trunk lip/package tray.......if not, then that piece has been replaced.

vinrad.jpg