do you know the specs on your cam?
i run a camaro site with some guys who have ALOT of experience with SBCs...you want to make sure that your carb is ideal for your situation, and not get a carb for what "everyone runs".
the address is
www.CamaroForums.com
look in the older camaro sections and ask for a carb recomendation.
i would be surprised if the headers for a truck chassis will fit the car...but headers for an sbc are literally a dime a dozen...thats the beauty of the 350..its one of the most common, and the cheapest engine to build in the world...