Horsepower limit for out of the box Edelbrock RPM heads

This is actually a very good conversation. The TFS heads actually sound VERY appealing. An OOTB Head, non-offset rocker AND LA intake and exhaust?? Oh and it flows 300CFM? That excites me. With the right set up I can make 600+ hp with that and that would put my street car in the 9's. A 1500 head that flows 215 on my bench doesn't excite me. Ill pay the extra 800 for the TFS head. Oh and I race a grudge car with TFS Cleveland Head (Ford, sorry) and it runs amazingly good out of the box. If thats any indication of how these heads will work then I am excited.