OK, so I went over to see the Challenger and got some pics. The hole in the firewall is there and the hood looks to be the later version w/ crumple zones.
The fender tag has been misplaced, but he's hoping he can find it. The build sheet is there and is in good shape. It has a "6" under carb fresh air package. This has to mean shaker right? It's an R/T and there were no other "fresh air packages" offered on a challenger other than a T/A. which this clearly isn't.
The VIN is JS23U0B407xxx

Here's some pics...He had it covered up so I didn't get a full body pic. Keep in mind, this is NOT a 100% correct professional restoration. Just restoring it himself as a nice cruiser. I wish he hadn't changed the color, but it is what it is. Original drivetrain is long gone anyway.