SVT motor is a 2.5L Duratec, It had higher compression pistons, High reving cams, extrude honed intake manifolds and higher flow fuel injectors to squeeze out the extra 30ish horses.
What people do is take the 210 hp rated 3L, swap in the high revving cams from the SVT motor, along with the intake manifolds, and are able to get more wheel horsepower.
When people talk about swapping the 3.0L block and putting the 2.5L heads on, we call this a "Hybrid" setup, no its not electic, its half SVT motor, half Taurus motor. I have seen Hybrid motors putting down as high as 230 whp. (which is like 260ish crank horses)
Only issue with a hybrid is you still have the oil drainback issues that you get with the 2.5L motor, but its not really a problem unless you dont overfill your oil by about half a quart.