There has been a lot of disscussion about the series 1, 2 and 3 240Z. The 280Z has similar changes and at first glance August 77 seems to be the change over point. I often see threads getting side tracked about these differences and when they occured.  A lot of good inforamtion, but its scattered over a lot of different threads and difficult to find again. This might be a goed way to collect information about these differences and share wi