Where is the fuel pump located on a 1997 Ford F250 7.5L?

On a 1997 Ford F250 with the 7.5L gasoline engine (a relatively uncommon engine in that year, more common was the 4.9L inline 6, 5.4L, or 7.3L diesel), the fuel pump is located inside the fuel tank. This is typical for most modern vehicles. You won't be able to access it without dropping the fuel tank.