Over on performance years the are saying the carpet had a special cut under the tracks so the seat bolts to the floor. I don't knew what is correct because I keep getting conflicts.
They say it get cut similar this image however our front just lays over the front legs but the back was cut this way. THis image is a A body. So until I see a original FGF I don't know.
Someone here has to have original carpet. Maybe Jim.