There are several indicators of mileage that can be used, some mentioned here, but what on earth would make you think that it was only driven 9615 miles from 1965-1977??
With 9000 original miles, assuming dry storage in the shade, the interior would look, smell and feel like brand new, not just the pedal pads, which cost $2.00 to replace. (I replace them on every car I've owned). Does it?