I have had some recent correspondence with several people about finding the numbers. The images I posted earlier show what they should look like, if you know where to look or what you are looking at. Sometimes the obvious isn’t. So I thought I would post a couple more photos to help you find what your looking for.
This number should be very near the ID plate mounting area on the Sprint coupe.
Sometimes this body number is hard to see because of rust, primer or missing altogether if the trunk floor has been replaced. (Click on the photo to see a larger image)