What is my wiring situation. I bought a obd1 to obd2 wiring conversion. but since the engine is obdo, would i need to get an obd0 to obd1 harness? I'm not sure what i should do.

 

Usually most people do the opposite... PUT A NEWER ENGINE in an older car, not the other way around. In your case, you would be better off using an OBD II setup (motor/ecu/...etc.),... preferbably from a 99-00 Civic SI coupe. A guy I know did about the same thing {B18A in a EG6} and it ended up costing him MORE in the long run.... than the simple B18B drop in.