I concur with engatwork. Get a Haynes manual and study it. Some FWD cars will require that you pull the engine and perform the clutch replacement on the bench due to lack of space to spread the engine and tranny apart in place. Honda's are notorious for the lack of space. I'm not sure about the Nissan. A good quick way to check for sufficient space is to look at the gap between the tranny housing and the side of the engine bay down low. 6 inches would be an absolute bare minimum to be able to get them apart in place.