Look like origionals full quarters and outer wheel wells and a front fender. Always find this stuff when I'm low on hobby money....
http://www.ebay.com/itm/1971-Ford-Mustang-Boss-351-Fastback-Quarterpanels/321300318234?_trksid=p2045573.m2042&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D27%26meid%3D4216106674663824705%26pid%3D100033%26prg%3D1011%26rk%3D2%26rkt%3D4%26sd%3D271375574494%26#ht_38wt_1153
http://www.ebay.com/itm/1971-Ford-Mustang-Boss-351-Fastback-Quarterpanels/321300318234?_trksid=p2045573.m2042&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D27%26meid%3D4216106674663824705%26pid%3D100033%26prg%3D1011%26rk%3D2%26rkt%3D4%26sd%3D271375574494%26#ht_38wt_1153