According to this page (with some pictures that Italcarguy posted), it's a 1970 1750 GTAM
http://www.allsportauto.com/modules....o&zl_idMD=1222
According to this page it's also a '70
http://www.ultimatecarpage.com/frame...hp&carnum=2522
I found some pictures on a Japanese site, posted below, that states it's a 1300