The '07 bearings are far cheaper. Don't know why. If you can give me ID, OD, and width as precisely as possible, I'd appreciate it. The flat is not visible. If you have the new shaft, you can see how the flat is oriented relative to the ends. You have to kind of feel for the interference between each consecutive tap on the shaft as you drift it out. I went toward the water pump side first. Once the right bearing is disengaged, you will have to push the shaft back the other way and get the second bearing out to remove the shaft. When reinstalling, place the shaft in the case first, then put each bearing part way in, then drive them in place.