Unless you're going with an aftermarket intake manifold AND head work or swap don't bother with a cam. Factory heads and intake don't really flow for **** and don't support much.
As for headers, shortys unless you're going all out on the above. JBA or Gibson are top quality but can be pricy. Pacesetter are a bit cheaper but also not as quality. Any header should use good gaskets, not the ones that come with the headers, and proper tq and sequence. If not you'll be fighting leaks