Engines only need what they need. If the engine doesn't need more air then more lift, or faster valve action doesn't add any power. The only way to know for sure is back to back testing. I proved to myself that once the engine has the air it needs then giving it more air than it needs just costs power. The extra lift costs money and power. Find out what the engine wants and then find a reliable way of providing that lift. I don't think geometry matters that much unless it is something serious like NASCAR or offshore racing. Drag race engines seem to be able to put up with some piss poor geometry.

The engine you are describing can get by with whatever fits. I wouldn't spend a dime on special parts for an engine like that.