hi, I searched a bunch and found no info on this, so hoping its just a known thing that I dont know. I bought an 85 front fj40 axle to swap into an 82 hj47 troopy to get front disc brakes. I was looking for 60 knuckles to swap, but found this whole axle thats actually for the car for cheaper then any knuckles I found. I figured rebuilding it would be way better. the axle that is on the cruiser currently has a square top u bolt that hugs the diff. The welded top perch thing that keeps the ubolt from sliding is different on the new axle as its a newer axle. it is kinda round shaped and its a little hard to say if the portion where the ubolt will actually contact the axle is round or square. this is a pic of it. round or square top bolt? im not crazy right? its hard to tell by looking at it?