U are missing the whole boat. You need to talk to someone who understands that the camshaft is the "brains" of the whole operation. Your current intake and heads may be a great combo but the cam may be shit for the application. It could also be that the heads are the missing link. The question is what is holding you back and once you figure that out then what exactly do you need from the missing link to maximize your current combo and let give you room to grow. Talk to a cam guy and see what you need to do.
Go here and read what Buddy has to say on the topic. It will open your eyes and hopefully give you some insight on what you need to do:
Cam Truth
Darren