Found Portland and Surfers on overtake but dont know if there working in AMS2 as well (can not check because of hospital stay). Is there a source to get some tracks from the CART 98 seasons like Vancouver, Belle Isle ore the other great stuff they drove back in the days? Would be awesome...
those tracks you found on overtake aren't AMS2 tracks, that's for sure, currently most mod tracks are ported over from Project Cars 2, and those aren't available on overtake. there is 1 non Project Cars 2 track available since a couple weeks, but that's a karting track.
