The last several digits of the VIN (Vehicle Identification Number) were stamped throughout the Challengers and other Mopars on the factory line for ID verification purposes. More often than not, they're quite crudely stamped, but stamped they are. They're usually the last 5-6 digits of the VIN number. These stamping locations are: on the fender tag, engine ID pad, passengers side just above the sump, dash tag, drivers door jamb decal, drivers side cowl, drivers side radiator support and if applicable, the broadcast sheet (usually hudden under the seat. When all these are identical and match, your vehicle is "numbers matching" hence the term. To see a breakdown of Lucy's fender tag options, please view the Purchasing the R/T page HERE.
If the numbers match, in short, the car and it's drivetrain are the "real deal". It's how the vehicle rolled off the factory floor. To many people, this is the ultimate. There are many, many "clones" or as I prefer to call them "tributes" or "replicas" (you clone sheep, not Mopars!) so it's lovely having a #'s matching vehicle (or in my case the drivetrain ready and waiting). There are only around a handful (literally) of REAL JS23U code vehicles in New Zealand. Running a NZ Mopar Registry in my past, it gave me a great insight into what we really have here. Knowing there are only a handful of real #'s 440 R/T vehicles just makes owning one a little more special.
I am truly thankful to own this car especially when considering she is 1 of 1,886 ever made with her 440bbl / TF727 R/T combo. Who knows how many of those cars are still on the roads today some 50 years later, given accidents, rusty heaps and fire/thefts, it will most definitely be a much lower figure now, that's for sure. Below are photos of my factory #'s 440 Magnum and the original transmission VIN stampings. The #'s engine is currently in a climate controlled unit after the Hemi conversion. The TF-727 transmission was rebuilt and is still in the vehicle to this date.