Set up for a smallblock race engine on pump gas 600hk

If you are not already married to those edelbrock heads(if they are the RPM version) i would recomend that you go for a better head,not that they are bad heads,they are not just a 600 horsepower head unless you want to push them hard.
Much more efficient to do with a better head,Some nicely ported W2s or some ported indy 360-1/-2 heads or Why not Edelbrocks Victor heads.
600Hp can be done with the stock replacement type heads but why would you unless you are already stuck with every other piece of suporting hardware needed to run them at that level?