[B16Z6+S20]

I have a 94 ex civic coupe with stock engine, and i bougth a 96 GSR engine, what mod do i have to make to put it in? i already read many thread about swaping, and my biggest question is about OBD's, are they compatible? or do i need rewiring?, and what about intake and exaust sensors?, and radiator cooling, do i need a bigger one?, i know about the basics like shift linkage, axels and motor mounts, anything else will be apreciated.