Horsepower limit for out of the box Edelbrock RPM heads

In response to the original post I've got stock RPM's on my 408 and it dyno'd at 489 hp at 5600 and 523 tq at 4500, 10 to 1 CR The specs on this cam are .566/.578, dur @ .050 244/248 with a 108 LSA. Dyno was done with a 750 quick fuel and long tubes.