M!ke, I took some time looking at Provamo;
- the window switches were the (1) piece Ducellier until about ~8ma810 (804 has single piece, 8ma820 has 2 singles).
- switches went from "down" to "up" between 8ma950 and 962.
- AC went from underdash to in-dash at 8ma1100.
- seats went to 1 piece with 8ma798.
- door panels went from 1 piece to 2 piece around 8ma700.
- AC fan seemed to go from 4 blade metal to white plastic between 898 and 936. There was another change around ~8ma1100 to the shrouded yellow plastic fan.
- gusssets from chassis to engine bay walls added around 8ma1050.
...unless, of course, your car is different For example, 3 AC vents appear haphazardly in several cars... Lee