Can't say that I'm nervous....
I've torn down a few engines that were running well for the sake of science....
My gut feeling tells me that this will be a change that will be well received. If it had been a street engine that saw nothing but trips to Dairy Queen and Rite Aid, then it would be fine. However, considering that it's going to be north of 6000 quite a bit, that little dip on the end of the hp curve doesn't give me warm and fuzzy feelings.
My feelings are that we will gain horsepower and rpms alone, just by having better control of the valvetrain. Not to mention the fact that, relatively speaking, the duration is up a tad and the lift is up by almost .065".