I've got an 8" axle here from (I think) a mustangII, I want to positively ID it, but annoyingly the data tag has been snapped off. Its 57" face to face. In the diff casing I see 5M17 cast in small letters and 19 in larger letters just to the right of that. Up near the yoke the I see "DW20 D" stamped and 315 cast in to it a couple of inches away. Did a search but all I find is data tag info. thanks!