Not quite sure what you're asking...maybe because I'm so damn tired, but I'll give this a shot.
Car: 92-95 Civic
Engine: B18C 93-95, B18B 93-95, B16A 92-95
If you choose one of those engines, the only thing you should need is engine, trans, ecu, axles, half shaft and shift linkage. I don't think you'll need a wiring harness change.
At least I think that's what engines you are talking about...