Part numbers

A few days ago I was reading about some one who wanted to change their shifter bushings. Some one suggested the bushings be purchased before starting the job. I plan on changing my shifter bushings but I wonder if having the part number would help me. Can some one supply me with those part numbers for a 71 240Z 4 speed? A second question might be: Are these paticular part numbers necessary when ordering from the local Nissan Dealer? cliff