Not enough info to really know for sure....what intake? rpm target? cam specs? compression? Back cuts? Port speed at .400-.500-.600 lift?
exhaust?
Really need to know everything about THAT particular engine...I've seen fast ports work, and not work...and I've seen slower ports work...and NOT work!
The iron heads we used to sell were so fast you would swear they would not work...I'm talking stupid fast air speeds. And they made power...sometimes more than we anticipated.