I know that there were changes to the dashboard over the years that the 240Z was made. Did any of those changes involve in ANY way the glovebox? I need to know so that I know what years I can take the 'box' part of the glovebox from to replace mine.

Glove boxes for the series one dash came in two varieties and list up to July 73 as part number 68600-E4600 and 68600-E4102. The difference seems to be one is folded cardboard and one is molded plastic. The locks and striker plates changed during that period three times with no referenced application dates. They should all interchange. All the rest of the glove bax parts listed in the Micro-Fiche appear only once for that period.