RusticCoupe

Hey guys i have a 96 impreza brighton coupe that is awd. It currently has the ej18 engine, but i was looking to swap in a ej25. Now i found a 99 legacy with auto trans with a 2.5. This should have the ej25d engine with the dohc that makes 165 hp right? It should just drop right in all ill need to do is chang throttle bodys and coils and possibly my headers correct?