Dodgeman wrote:
The round port head won't matter so much as the intake mix is going in under pressure, so it will probably be OK even with the small valves. It's the exgaust that might need a little attention simply because there will be so much more of it.

Big ports are good in NA engines because the pressure that's pushing the mix in there is never more than 1 bar absolute, so we need all the cross section of port size we can get, but with boost, you can feed an engine through a drinking straw. [almost]