With a special built car such as this runner may have been it could have been a "engine delete" build also.
There is nothing on the tag that indicates this was a special built car so we can't claim that yet. The VON number is a standard number, not a 'special built/handling/purpose' VON. The Y16 code indicates a standard sales bank car, not something special.
It's a Y16 sales bank car. It's hard to imagine someone that orders cars all day made this significant of a screw up that wasn't caught by quality control, someone on the line or at the final inspection.
I can't find the link on FBBO to the BS. Might you have a link?
The car was built at STL and it
looks like the SPD is 227 so it was built at the wrong plant and well after SB were built for this car to be confused with a SB install. Plus its a 21 not 23 car.
The car does not code for an axle package. What does the BS say about the suspension? A 440/Hemi car would have a different suspension than a standard RR. RR's
could have the same suspension as a 440 car but if the BS shows the 383 suspension....well that's a pretty strong clue that it was not a 440 car.
What size are the fuel lines? In 69 the fuel lines were larger for the 440/Hemi compared to the 383. I don't know if that is true for 70's but if it is, it's worth checking.
So far, all that has been proven is an administrative mistake (VIN and door tag). The fender tag is more credible as it is more typical and related to actual production of the car. There has been nothing shown or proven that anything out of the ordinary was actually produced. In order to prove the car came with a 440, you will need more tangible documentation from the car.
"Never say never" still needs proof.