Horsepower limit for out of the box Edelbrock RPM heads

All I will add is I put a thrashing on guys with better, more expensive parts every week and love doing it. When guys walk over to see my sons small block they walk away shaking their heads. Hard work and track testing will beat them if you are up to it. I’m winding down my race days and my son doesn’t have the desire to learn the tricks. He’s 10 times the driver I am but it ends there. I have a few guys interested in my heads up car so I may be selling it and if so I would have the money to upgrade