I’ve had to change the pump in my tank and the high pressure pump on the rail. 99 7.3
You had me second guessing for a moment so I had to pull out the Haynes Repair Manual for Ford Super Duty F-250 & F-350 Pick-ups/1999 thru 2002 Gasoline and diesel engines
Here's what I have for a fuel pump and how to replace it.
Below is a Youtube video of a F-450 that has a different fuel tank than mine. My fuel tank is before the axle along the driver side frame underneath the bed of the truck. However, the fuel tank filter screen system & fuel level sending unit is similar.
I've had to replace my tank straps on my pick-up about a year or so ago. At that time, I popped that unit out to make sure the screens looked okay inside of my fuel tank and it was.
The following video, if you care to see for yourself, has a different lining in it than what mine was. The lining in mine is a think plastic that showed no signs of flaking.
So to confirm, I just have a single inline fuel pump along the frame, a fuel level sending unit and fuel screen system in the tank.
Now I can go to bed & sleep easy