Yeah - on my 88, everything I've been replacing so far is original. Makes me happy - even tho with 240Kmiles, that's turning out to be a lot all of a sudden...
Quite a lot swaps from 1987-1995 for certain - 1996 was the first year for OBD-II. Some minor electronics (like the NSS, for instance) probably swap all the way up - I just haven't had a chance to verify that little factoid yet...
5-90