97 b18c1 gsr obd2 engine into 92 civic si

Hi, im just new to this forum. My brother just totaled his 97 gsr and i was planning to swap the engine into my 92 civic si. i was wondering if i can reuse the obd2 engine harness with the ecu. And what else would i need to make this work in my 92 civic si. Thanks for helping.