The edlebrock rpm II power range i think is 1500-6500 rpm. If it was me i wolud not want go much over 6500rpm maybe 6800 rpm at the most. go to afr's website and look at the dyno results they have on there heads that shows how much horsepower you can make. some of them are making over 400hp
i have the trickflow r series and it screams ! still a long runner just has the wide cross section for flow ! still has a lower starting power range 2500-7250 most cams don't work till 3000 any ways and has the upper flow for top end !