well i'm trying to decide what size cam to get and I was thinking that from my old set up that I could benifit from going a little more on my exhaust duration.

the cc 305 has 5* more exhaust duration will that help on my power keep in mind that I have the mids.

 

You will benifit. Maybe not so much in the low end but as soon as you do that H/C package youll need them anyways