452 heads

Im looking at a set of "ported" 452 heads. Curious is what he is say is correct? My cam will be right around .540 and .560 solid cam. What kind power could I expect with these on a .030 over 440 10 to 1 comp. .540 solid cam. Dual tunnel ram? 500hp? Does the flow support that? Also are these fully ported? Assuming there stock CC combustion chambers. How much would I have to take off the head to get them down to 84ccThanks again and happy Thanksgiving.

i have a pair of ported 452 big block heads i need to sell. these heads flow 268/220 around 500-550 lift. stock small valves with upgraded hemi type springs and retainers. they can bolt on a milder engine as is worry free or do as you wish with bigger valves etc if thats what you want.