There really isn't one specific way to launch your car. You'll have to experiment with numerous RPMs to get the launch that hooks -- too many variables -- track prep, weather, length of burnout, etc. You'll probably want to also experiment with slipping the clutch versus simply dumping it although slipping the clutch with 400 hp could be a recipe for clutch failure.
I can tell you this much -- launching a 400 hp car on drag radials on the stock 28 spline sticks is a sure fire way to get a ride home on a flatbed tow truck.