Edelbrock LD340 Intake Manifold Usable Max RPM?

I imagine if the rest is built to turn 7000 + rpm the manifold will go there maybe kicking and screaming a little, obviously won't make as much hp as the proper manifold but the whole class is basically held back the same as you (as long their not cheating). I'd check into the Darin's idea of tuning the headers higher than the manifold among other things.