Roadrunner or Not

Ding,Ding,Ding...we have a winner.

Someone got creative with a stamp kit and likely a fabricated/altered title from another state and got semi legit paperwork for a (possibly) stolen or (perhaps) rebuilt or salvaged car.

If the guy doing this had any brains then he should have used the 383 engine code (H) along with an actual B-body plant code (A,G,E) to avoid raising any more red flags then a car with no VIN tag already would.
Trying to pass off a car with no VIN tag as some sort of factory special build with a motor never offered from a plant that never built B-bodies is something a Chevy guy would do.

I would be most worried about WHY they did it. I am betting the car was stolen and stripped at one point. That would be the only reason I could think of.

Either that or someone went to a LOT of trouble to try and fake a never built road runner. That would be kinda stupid.

There are definitely enough flags raised to make it seem illegitimate. As stated above, if the paperwork and vehicle have been modified, it probably wasn't by someone that is well versed on Chrysler VIN coding. If we assume that the title is not original to the car then determining the motive behind the person that coupled the title with the car is crucial.

I'm glad that Diana's Dart chimed back in. I don't believe that anyone here wants them to lose their car. - Nor does anyone want it to be kept from the rightful owner if it turns out to be stolen.

We're all familiar with vehicles that have been cloned. It usually entails changing emblems, decals, hoods, and other options. Most people do it because it's a method of having the drive and feel of the car they've dreamt of but cannot afford. Messing around with titles and VIN numbers is more likely to be by someone less legitimate.