The $1k cam is a custom grind cam, it include the cam it self, the install, and the tune. The items that are still needed are springs and pushrods, optional mods would be things like a double roller timing set (strongly suggested), a underdrive pulley and maybe a ARP crank bolt.
The cam will be determined based off of the things you are looking for out of the car so we can get this all figured out once we talk.
As far as headers go we have a deal on those going on as well, with cats they are 1900 installed and tuned. The only thing you would need for this would be the exhaust manifold gaskets. We could probably discount you on the tune since you are already getting it with the cam. We highly suggest doing headers if you are going to do a cam. Keep in mind these are top of the line headers. They are made by Kooks are very nice quality.
Someone mentioned a LS6 intake manifold and i would say dont do that because you already have it. The GTO motor is not the motor that came out of the F-body, its a bit of everything. We have a very free flowing intake manifold as is. Your best bet would be to go with a FAST intake manifold but i would hold off on that until you upgrade your heads, you will find you will out flow the 241 heads on the car really quick with a FAST intake manifold. If you have any question please feel free to give us a call or PM us. We would be more than happy to walk you through the steps. Just try to keep a goal in mind for your car, that will help making decisions a bit easier.
You will see a good amount of power between the two, so I would say this is a very good place to start.
Thanks,
Savi