I just looked in my 'Old Control Arm Bolts' can, and I found what I believe to be a factory upper control arm front, axle end bolt from my '92. It takes a T50 Torx socket. Our three other, newer XJs had those odd bolts with the bent ears on the front, axle end of the uppers. When I replace the upper arms and the bushings, I like to replace the bolt with one having a normal hex head, typically Grade 8, allowing a higher torque.