I've spent the day with an old friend and was curious about how His car would decode... it doesn't on any decoder website.
Someone at one time stamped 8 and 4 on the tag. With that on there it decodes as a'63 Chrysler 300J. His dad gave him the car before passing and was always under the impression that it was an original maxwedge. I never thought it was, just a v8 Sport Fury.