They are telling you the truth. The only real way to hit those kinds of numbers in an SVT is forced induction. If you are all about the motor then go for it. Mine is all motor because the military doesn't really pay enough to get forced induction but I have done everything I can to my suspension and I contend I could take just about anyone on a curvy road! it has the power to push through the corners and its very light on its wheels. haha good luck man.
There are two kinds of people: those who say to God, "Thy will be done," and those to whom God says, "All right, then, have it your way."
C. S. Lewis