If I can recall what the dyno operator told me before the pulls were made.... he said something to the effect of "it's normal to see around a 10-20hp gain on a NA combo, and up to a 50hp gain on a supercharged combo (which is what they specialize in)... the gains are made through tuning the timing/fuel delivery of course.
I wouldn't recommend just throwing a 200 shot on it either... I worked up from a 100 shot on the new combo to play safe
Later