Awesome build, I would throw a transgo hd2 kit and a sonnax pressure regulating boost valve in the 80e for a little added insurance. Boost and weight might be pushing the limit stock.
I'm not familiar with the 06 gto cam, but if its similiar to the ls6 cam, thats a favorite budget boost cam around most of the forums.


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Probably just do the bov on the other end tank, and have a clean pipe coming out of the radiator support directly beside the radiator up and into the tb. 
The ls4 front manifold on the drivers side...
The ls4 front manifold on the passenger side
