Well, it's been a really long time since all this started. Here's the update:
Turns out that Port Lavaca Dodge installed an O'Reilly's reman that they'd had on inventory for about a year. Ran like crap. Fueling was uneven from one cylinder to the next. Was getting aluminum shavings. My custom guy discovered all this over a long period of time, which included a paper-chase on invoices, and a bit of heart-to-heart conscience tweaking between him and the local Corpus Christi O'Reilly's regional (or district?) manager.
Long and short, it was a few additional weeks of trucklessness before all this was resolved, O'Reilly's warranteed the pump, Mike did the install, timing, new injectors, and it runs and drives really well.
But the speedometer still has never been addressed, and I still get the ABS/Brake light illuminating on the dashboard... . And the cruise, to which I was never emotionally attached, doesn't work.
Speedo/Odo read about 62% of real speed/distance. I've seen ads on the 'net for little electronic devices that claim to correct the input signal, and supposedly even extinguish codes. Anybody know if that would be a good $180 to spend, or would I just be ******* into very expensive wind?