PI WRHP GAINS ON 96-98 stang ?

Ok , I am trying to find the people out there that have done a 99-02 fully ported pi head swap on a 96-98 stang gt. I would like to know what kind of rwhp gains where made by doing this swap ? Also if your running a differnt cam let me know what gains came over the stock cam in a set of ip heads. And can you all so let me know if the gains you received where tested on a dyno.

Thanks and must say I am new to this site but it is by far the best place to find out info on my 4.6L stang !!!!!!!!!!