I need it identify this rear assy ...I have been told many different types I ordered knuckles from Summit and they seem to fit fine...they are'nt even performance ones they have the same part # as the busted factory ones...I have called the dealer and many othe parts venders locally and if it does not have a definitive year make and model no one seems to want to help me out...I have been told it is out of a 89 - 97 bird cougar or mark 8 ,The c-v boot kits that napa sent to the shop are not even close, the axles are 28 spline , 8.8 ring gear with a alluminum housing , diff. tag reads   434A 3 27 88 8B16, Right side knuckle was a E9SC-5A970-EA ,  The cover has a # of F4LW-4033-AA , Any help would be greatly appreciated since I have to reassemble it all to measure the offset and backspacing neede for this application...it had adapters and spaces...dont want those on there anymore. 

Thanks I asked the warehouse if the #'s for the one he looked up and the #'s for the mark 8 were different. Told me yes so I ordered the outers and will see in a few days when they come in...I am also looking for adjustable opper arms for this application. The frame is notched for clearance so couldnt I use a straight adjustable upper arm of the same length ?