As mrmoparchip said, you can't backtrack. the SON was at the top of the buildsheet, and the bottom of the fender tag, bottom right, which listed all the selected options for that car. The VIN# was assigned at the end of the build, but not Included on the buildsheet or tag. This applied thru 1968. In 67' the son was five digits, in 68' there were six. In 1969 as part of the clean air act, Emissions were restricted further, and VIN numbers were assigned to the fender tag and the buildsheet to discourage theft, and , which is why those numbers were also stamped on the drivetrains in a more uniformly fashion. In the end, no fender tag, no SON.
The confusion I believe is the SON is not the VIN#. they are two different numbers that have nothing to do with each other.
However, Others here are also correct, in that all that is looked at with these old cars is the VIN# and Title, in most states. That tells us all that we are quite old, and we are speaking of cars that are 48+ years old. That is like speaking of cars made in 1922 when I graduated from high school in 1970. I feel in reality, we are becoming quite irrelevant. So will cops chase old farts like us? not likely.LoL
