Okay...
I have really good flow to the inlet side of the pump, and I have some fuel flow on the outlet, but not what it normally is. I pulled the pump off of the side of the engine, and I'm not seeing very good suction. I think it's the pump.
Darn it.
I still have to try the gravity-fed tank route. I will try to do it this weekend and report back.
In the meantime, I will track down another pump. Thanks, everyone!