The 1978 Thunderbird offered 5 colors of moonroof tint to match the vinyl roof, three engines (302, 351, 400), three seating configurations (solid bench, split bench, buckets) with additional variations. The 1982 Thunderbird had over 10,000 possible configurations.
It's only recently that popular equipment packages which made for money savings changed to very limited configurations where items are only available via packages. It is a shameful step backward.