94 civic ls?

My friend bought a 94 civic ex 5spd with a 92 b18a1 and he doesnt know what he all needs to complete the swap, the motor is not in the car as you can imagine. He has a pr4 ecu a new clutch and flywheel, gsr shift linkage, etc… From what we’ve heard he needs a 94-01 gsr or ls hydro tranny and 94-01 mounts from either a gsr or ls, is thst true? if not what does he need and what kind of a ecu harness does he need if any?