I have fixed my 1982, 1983 and 1984 seasons, mostly by stuff I've managed to find. I have painted a lot of stuff myself too, like correcting the last numbers/names on the cars, etc. Of course I did year specific leadeboards for each year which show the driver, team, engine manufacturer, etc.
SD cars in their default form are total crap. We all know that. I've changed the physics, fixed probably 100 skins during the year. For example most cars used the same skin. Like both Alboreto and Berger in 1984 Ferrari had the name plate "ALBORETO" on the side, same number 27, Williams 1983 had text "MOBIL 1 RALY FORMULA". That actually cracked me up. How can you even misspell something like that on a car skin, etc. Too many to mention. They drive better now and they look better. They COULD look even much better but it's so much work.
I have collected all best helmets and driver faces that I've managed to find too. For example Senna 1984 Toleman looks actually pretty good now. Best helmets for Lauda, Prost, Piquet, etc. Villeneuve helmet is 90% accurate for 1982 too. One ad should be changed still, etc. Slowly but surely these have become a bit enjoyable.
If you have stuff that we could use in 1982, 1983 and 1984 seasons, please let me know. I'll put all in.
Keke's engine manufacturer is Williams Honda in the pic because I forgot to switch from 1984 leaderboard to 1982. It's all correct in the actual product.
Maybe I should start cleaning up the actual car skins next? SD work is very sloppy compared to say, the Lotus98T based 1986 skins which are incredible (I actually improved them too by adding plenty of driver suits, gloves, etc.)