Nice video..short & simple. In my case (98 12V 2500) the whole bolt assy came out as one, IE the bolt came out of the pumpkin instead of the nuts breaking free. I would add a step to what you outlined for cleaning the top of the pumpkin prior to removing the sensor so all that road crud doesn't fall inside. I used a 6" wire brush to break free all the road grime and some air (canned or compressor) prior to removing the sensor. Especially important since I just flushed all of the old oil and just put new oil in.
use a puller not a rubber mallet to get the pinion off so you don"t cause yourself other issues. the little thingy, thing amagiggy is a called a reddi or speedi sleeve.
nope 12v cummins have a different connector you can use the later model sender unit from a 24v but you have to change the connector over and grind off part of the plug for it to work since the 12v part is no longer made
Also does that sending unit make any noise while operating or is it quiet in other words with the truck on or the key turn can you lay under the truck and hear the sending unit pumping fuel?