Sounds like Jared is in the same boat as I am. I already have some good, ported Edelbrock heads (just under 62cc I believe--they've been shaved ever so slightly) with roller rockers on a 350. I am using the Weiand Stealth intake since I think it will perform best for my setup overall. I would think most of this would come down to cam selection more then anything else at this point. From some of the reading I have been doing, 350 to 450 hp seems in the ballpark, but beyond that...well... it looks like a change in heads is necessary. I'm not knocking the Edelbrocks, mind you, but there are better ones out there. Since I am on a shoestring budget, the options are limited to the best used ones I could find at a good price. So the RPMs are it, period. If I am looking at a 400 hp limit, so be it. I'm sure it will put smiles on my face when I mash the thottle
Davy