400's are they any good?

Im using the mopar stage vi max wedge heads on my 451 build. These particular heads have a 74-75 cc (measured professionally) combustion chamber.Rhoads lifters have been suggested to me as well,as I need a compromise somwhere due to the car being both street and track.Cam will be borderline streetable .600ish lift.

I cant see using old iron heads for thier smaller cc chamber as being worth while. They take a lot of $$ to bring up to snuff and then you still have heads that will give you 550 ish h.p

The victor heads sound good,should support upwards of 750 h.p without trouble. There are certain 400 blocks rumoured to be capable of 800+ h.p but I think that with studs and billet caps most 400's will survive at this level.