ATI OD super-damper installed. This thing was a pita. The keyway doesn't extend all the way out so I had to eyeball the alignment while simultaneously trying press on the pulley. I lightly tapped the pulley to get it started and then cut the thick washer off an old crank bolt so that it would have enough threads to pull the pulley onto the shaft. I got lucky and my keyway stayed aligned so I only had to do it once. Used old pulley to align oil pump prior to install.