Head and cam selection help for 440

ive already got an intake and can add a spacer. So im guessing we need to port the irons and get a roller cam then? And also guessing your answer is NO, ootb aluminum heads do not flow much better without porting than the stock um-ported irons, so take the money i have and just port the irons because going to aluminums WITHOUT porting will not do much over what i have now? Is this correct?