I found this in e bay, what do you think???? is it a real locker? or just a LSD??
http://www.ebay.com/itm/Ford-9-Detroit-Locker-31-Spline-2-89-Bearings-NASCAR-/360447353593?hash=item53ec5622f9&item=360447353593&pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr
http://www.ebay.com/itm/Ford-9-Detroit-Locker-31-Spline-2-89-Bearings-NASCAR-/360447353593?hash=item53ec5622f9&item=360447353593&pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr