Body in white Challenger?

Even as a drag racer, I never understood the modern body in white programs, be in gm, ford, Chrysler. Opposed to a shell that was missing half the body panels, a running driving 6 cyl challenger, or even a 5.7 car that was tapped on the nose, could be had for the same, or less $....and you'd have a title ta boot.....and glass....and seats....and carpet, yada yada. Maybe if they were 3k, but at 8k...yikes
You missed the key words of the body in white program.
“Drag Racer” who will not need any interior you mentioned from the factory if much of anything at all.
No need for heavy fenders and other parts. What you don’t need is removed.

8K for a body in white is an excellent deal for the serious racer.