I had previously disassemble the pump assembly to find what I at first thought was an oddly shaped spring, which it was. What I learned by researching the parts was that the spring's odd shape was a result of something having gotten caught in the pump and jamming the impeller.
After ordering the parts, I watched the "repair video" a few time and proceeded to remove and replaced the affected parts. Reassembly went pretty much as described with the one small glitch being the seating of the new seal at the bottom of the pump. I would advise cleaning the shaft and seat extremely well and then – maybe – lubricating the seal and seat with a small amount of dishwashing liquid to ease the seating of the seal. In my case, was pressed partway into the seat, I could no longer remove the seal without damaging it, so I managed to press it into place with a 13/16" deep well socket that fit nicely over the perimeter of the seal, allowing me to press it in evenly. Reassembly after that was child's play and the pump rebuild resolved the aforementioned problems of noise and inefficient draining.
Lastly, on the test run, I noticed some water beneath the dishwasher and initially thought the new seal had failed. What it turned out to be – I believe – was water that remained in the bottom of the pump leaking through while the new seal was being fitted. No Leakes were observed during a test run or thereafter. Something to keep in mind if you're going to attempt this.
Pay close attention to the sequence in which the parts are installed with special attention being paid to the positioning of the check valve ball/balls. They are easy to misplace.
Overall a gratifying repair for what appeared to be a fair market price AND the parts showed up in a little over 24 hours.