In the SVT you want to shift a hair before redline in every gear. It makes power well past the stock redline so use as much of your powerband as possible.
I would start launching with a 3000 rpm clutch slip and adjust from there. What ever you do, if it hops, push in the clutch and/or let off the gas. Wheel hop can be fatal.
You are better off having a little wheel spin then bogging the engine too...
