Uh oh...fuel pump death whine

[Goodspeed]

So tonight I remote-started my car, and as I walk up to it a few minutes later I can hear a faint whine from the rear. Getting down on my hands and knees I find that its coming from the fuel pump. Its faint but noticeable when standing normally next to the car, and it got louder for about 2 seconds when I shut the car off.

I'm guessing age (20 yrs. old) got the best of it, but I did run the tank down to E before filling it up a few days ago. I have read that Walbro's are especially susceptible to damage from starvation, but I honestly didn't even think about it with the factory pump. The car did have troubles sometimes starting on a hot day after sitting for a while, which I've read is also a sign of death approaching; I didn't learn this however until it had been doing that for a few weeks.

So my question is, how long do you think I have before it takes a dump? I will have a Walbro 255lph on the way in the morning, but I just want to make sure I can make it a few days of 4 mile total commutes without it dying on me. Speaking of which, when one dies, does the car just sputter out like it ran out of gas, or will it cause a lean condition and resultant damage? I'm pretty worried about this so I want to make sure I stay safe.

Lastly, and I've always presumed this (just want to be 100% sure), but one can install a more capable fuel pump w/o having to install larger injectors, correct? As in, a 255lph pump doesn't necessitate >440cc stock injectors, it'll just flow what the ECU/injectors need with room to spare right? I haven't gotten my hands dirty with anything fuel related yet so I'm not positive on this.

Thanks for your help, I hope I can get this taken care of ASAP.