Most of the SCE car mods would be copy & paste. Tracks are almost copy & paste. Properly ported SCE tracks pretty much just need 2 lines edited. You will be missing the updated AMS features but either the car or track mods should work.
Tracks usually just need this updated in the SCN file:
To this:
MASRandomFile=CloudsRandomA
MASFile=CloudsDefault.MAS
Obviously this will not work for every track so it will take a general understanding of how the games are built to get them all to work. And it takes another level of modding understanding to get them updated or to full "AMS standards".
Thank you! This is great help I do wonder why such a good game doesn't have the massive mod count of Assetto Corsa, esepcially since it's built on rfactor, which was king of modding I believe!