The initial reason I am going to put new ones on, is because some of you may remember, I was having a horrible vibration atsteady 65+ mph..I occasionally heard a binding noise, everyone agreed it seemed to be the rear diff. I checked with an angle gauge on the perches and the face of the pinion yoke. they are 6 degree difference, the nose of pinion is UP that much from the perches..

I was going to square them at zero. I wonder if these reamed out holes are part of the problem as well? the pins in the springs are not damaged..Makes me wonder

Ideas on what this is about are welcomed, and tips on something to watch for when I weld new ones on as well. I notice new ones have a slightly larger pilot hole...no biggie?
Thanks