I was under the impression that the T-rex was used in the pre 99 cars w/ the returning fuel system. Starting in 99, they did an in tank replacement of the pump.
If it won't work, and I'm sure someone will chime in and let you know for sure, get the focus pump, it's a direct replacement and will work for you. They run between $90-$120, depending upon who you order them from.
they are used on those cars. this pump was used with the FMU.
it will boost flow. The FMU would restrict the return path back to the tank,
this raised pressure.