As others have said, there's probably no comprehensive list and a lot of stuff could have been changed or upgraded since then, but here's the manual:
It's probably more important that she has everything you want, rather than everything that she had in 1987.
I have an 87 C22 and I love her. It's a good vintage in my opinion...kind of transitional period between the original and the Mk II (but not so special as to warrant premium pricing). Ping me if you have any questions.