Slightly strange head flow question.

I agree with Brian on this, but I don't think there will be that much better boost with the same cam with the RPMs over the RHS. Because the RHS is a farily small but fast port, it works well with low lifts. The RPMs at "full boogie" are a slower port at lower lifts. You would have to cam to match them. No port can do any good without the valve being open to the point where the port works. This is why good porting does not simply make a lot of flow at high lifts, but improvements from the seat to max lift. But if a port flows good at.500 and great at.600, you'll never be able to reach "great" with a .520 lift cam.