The new Clevite 77 High Performance rod bearings do not have the chamfer on one edge any more. They are now cut off where the chamfer use to be and the part number is changed from “H” to “HN” (narrow). Now you have to read the small writing on the back of each bearing half to make sure you are installing it correct. I got 14 out of 16 right. Had I not taken the side clearance readings, I would have had trouble. I had two sets of old readings to compare them with (my journal).