I'm trynna figure this out. I want to get a set of 04 cobra heads(c heads) and port and polish then I want to add my 98 intake cams...are the gains worth it?? Should I. Consider putting int the 98 intake cams on the 04 heads?? What do u guys think/recommend?? What HP gains am looking at if I go with this set up?? (Also gonna port match a 01 cobra intake manifold to heads)