Wonder if the glove box doors were changed or emblem added? The custom interior tend to all have the trim on the dash pad and the bird on the gb door, aside from the obvious seats, door panels, etc. I personally have never seen an original std. interior car with the gb emblem, in only 30 years of eyeing Firebirds. Although some folks here are correct that there were some misterys about these cars, which we believe had something to do with the plants they were built at. My 2 cents, if ya like the bird on the door, just add it, you'd still be original! That's what I did.