Well . . .
Long story short - the engine finally turned over today. Helped it along with some gas for a couple of minutes, keeping it around 1,000 rpm's. Soon after, the car finally idled appropriately on its own. Oh, glory day.
I assume the new fuel pump helped.
My suspicion for the car not starting up immediately after the pump installation is that while disabled, it had been elevated on lifts for about a week. I was thinking that maybe the steep incline was preventing the fuel from running through the lines.
Anyway, thanks Big Evil for the one and only bit of advice.