If I remember correctly, my 85 had 1 1/4” pillow blocks. If your bearings are bad, you can re used your housings that may or may not bill drilled and doweled for alignment. I ended up taking the bearings out of flange mount bearings for a couple of mine, since Mcguire bearing didn’t have 4 pillow blocks the right size on hand. I believe the upgraded size is 1 7/16”