My friend with the 89 teg blew his engine (the d16a1) and they replaced it with a brown top ZC. The other ZC is the one that bolts in.
i found this info on this site
http://hybrid2.honda-perf.org/tech/4gtech.html#ZC
heres one of the quotes: The Integra 1.6L does not bolt in. Compared to the ZC, there is no reason to try to fit a 1G Integra 1.6L. At only 118hp, it's not worth the trouble.