Hey welcome to the forum. You might want to check out
www.honda-tech.com also. They have a very nice 4th gen forum.
Our 88-91 Civics/Crx's didn't come with v-tec in the US. What kind of goals are you looking for the car? If your just looking for some cheap HP for a little pep I would recommend a D16Y8 head swap (which will raise your comp to about 10.5:1 I believe), header, and a nice exhaust setup.
On the other hand if you want quite a bit more power you could invest in a "junkyard turbo" setup. I have seen people put decent kits together for $500.
Like I said what are your goals for the car. Also how many miles are on your engine, this would be the basis for my decissions at the moment.