The taurus SHO doesnt use the 5.0. It uses a 3.5 TT engine that makes 365hp stock. I hear people with tuners are getting another 90 hp out of them.
The 5.0 mustang is seeing around a 40hp jump, but im not sure if you will see that much out of the truck engine. This is due to the lack of RPM. the mustangs are spinning much harder to get those ponys.