Horsepower limit for out of the box Edelbrock RPM heads

I will probably chassis dyno and tune my Duster just because i've never done it before and I'd like to see how a pro tunes it for max power. Also I no longer live 15 minutes from the drag strip now it's more like 90 minutes away, the shop I go to for machining and dyno stuff is only 25 minutes away. Plus I know the guys who run that shop pretty well they're really cool and work on legit 8-second cars and 1000+ HP engines like it's just another day in the office.