Speaking from experience, I like the TFS twisted wedge R 225 heads for the kind of airflow you are talking about, you can also look at the step down from this, the non CNC version is a smaller port volume. Really the intake isn't the restriction in high hp blown applications, it's the exhaust. This is because you are forcing the air in anyway, so even a poorly designed head, like a stocker, will still produce decent power in low boost situations. In high boost, the exhaust becomes a restriction because for example, if the intake and exhaust valves were both opened for the same amount of time, and the same lift(this is why dual pattern cams are superior), the pressurized intake side can move in more volume than the exhaust which is not pressurized can move in the same timeframe, this is even more evident in a turbo application. Also the AFR 225 is a decent head. The minimum you should look at is the 205 of Trick Flow or the AFR. There are also cheap chinese rip offs of Vic Jr. heads out there too. there are a lot of possibilities, but these are two of the more popular ones.
