Regarding the slop in the right hand timing chain, I want to urge everyone not to jump to conclusions. Why? The timing chain adjusters are controled by oil pressure. With no oil pressure, some slack in the chains is to be expected. Timing chain rattle is a well known issue on 4.6's. Tons of these motors have this issue and they run fine. It simply may be a question about where the motor has stopped as to why one side is tight and the other is not. For proof, try rotating the motor in a CW direction. Likey you will see the chains on both sides get tight and loose as the valves open and close. Note to say this can't be a timing chain problem. IMO, more tests are need. As as already been suggested, look of evidence of the timing chain hitting other things like the cover. From the vid, I can't see the condition of the timing chain adjusting shoe. That's the curved piece that applies pressure from the timing chain adjusters. I'm interested in seeing if the plastic wear surface is still intact. It may be necessary to compress the adjusters to get a good view. Note, do not rotate the motor once tension has been released on the adjusters. Obviously it's easier to see once the cover has been removed instead of viewing through the value covers as I first suggested. Is there any wear in the trigger wheel at the key way or on the crank key way? Should be able to see metal fatigue. Did you ever inspect the CKP sensor itself? Debris on the sensor? Does the magnet still work? Electrical connector clean and corrosion free? Note UD pulleys are known to impact the quality of the CKP sensor signal. The Steeda pulleys are some of the better ones. However, if the rubber crank damper has gotten hard, that can affect the quality of the CKP sensor. Part of me still thinks that a true hard failure with the CKP would show up on multiple cylinders (instead of favoring #2). The saga continues.