Tearing it down

Well I am tearing down my engine to install a new Camshaft and lifters and Timing Chain and Gears. Cam is a Comp Cam Camshaft, Hydraulic Flat Tappet, Advertised Duration 272/272, Lift .454/.454, Matching Hydraulic lifters, Timing Chain is a double roller Crane Cam Model 69993-1 I have a couple questions-- If I install this setup I have a set of Mopar 360 heads part # 4343475. Heads are stock and have never been machined as far as I can tell. Would I need to change out anything if I decided to use these heads? I will be running an Edelbrock Performer manifold and an Edelbrock 600 CFM Carb, Hooker Comp Headers, Transmission is TCI Streetfighter with a TPI Converter 2500 stall. Would I need to have these heads machined to keep up the compression ratio? And if so, would I need to change out the stock pushrods? Would changing out the stock rockers for roller rockers make a difference? Any help is appreciated in this as I am kind of new at this and am trying to get a decent setup that will be a strong low end torque motor. Would advancing the cam also give me more bang? I posted a couple pics of the teardown as of now. Sorry these are cell phone pics. My camera is DOA.