Full exhausts to open headers gain

A 2.5" system with 589ci is SMALL, which is why I mentioned this, its the same exact system he ran with the mild 440 which was in the car previous. General consensus is a 2/10ths gain is poss which I would go along with, thats roughly 25>30hp which is just about how much we are off from the best dyno run which was 695 on the day>
695hp@3800lbs=
60 Foot E.T. : 1.43
1/8 Mile E.T. : 6.47
1/8 Mile Trap Speed : 104.98
1/4 Mile E.T. : 10.26
1/4 Mile Trap Speed : 131
1/4 Mile Trap RPM :
as we are only .09 off that currently and around 1 mph off corked up its reasonable to think that it could be a 10.1 car, and I believe there's still some in the chassis as it is, normally there always is...is it worth doing?.....hell yeah in my book, lets hope we get to try it next year....thanks for the replies.