Limits of an Edelbrock performer and 1405 600cfm carb

Basically I've got a 318 I'm gonna build with magnum heads and the limiting factor is an Edelbrock 600 and a regular performer. What I want to know is, how much power can you make with this intake and carb without doing anything exotic, and without going over the point to where the carb and intake are.choking the engine. I know an RPM and 750 carb will make more power. I just was curious as to the limits of these two put together. This engine will probably end up in a daily driven Volare or valiant. I've seen shootouts of the Edelbrock performer series intakes but they were all on hopped up chevys and the regular performer was definitely choking their engine.