Help w/Bucket Seat ID

Alaskan_TA said
It looks like one of them has a broadcast sheet in the bottom. What does the VIN say?

It is not the 1970 or 1971 E-Body style.

All the numbers are faded/washed out. Also, if I lifted the springs up, that build sheet would disintegrate into a hundred pieces. Thanks for the suggestion though - good eye.