Head and cam selection help for 440

I also want to swap out the cam to take advantage of extra flow from better heads. Looking at IQ52's post about his pops engine that has the same lower end as mine, he did in fact make huge gains with porting and cam changes, then head changes, so im not sure why i wouldnt see nice gains by doing the same thing..? Being i already have a good set of 452 heads, as far as performance, would i be better off sending them to IQ52 to port them, or spending that money on a set of ootb aluminums? Thats why im asking how well ootb aluminums flow compared to stock irons to try and get an idea..I know the aluminums have more potential than irons as far as porting goes, but i have 'heard' that ootb aluminums usually already flow much more than stock irons, but need to make sure that is true..
PRH gave some good advice. You do know he is very respected mopar master head porter and cam specialist.