Todd, I have a hard time believing the Series 2 is any different in that regard than the Series 1. Considering our head ports are identical height and width, and we have the same mismatch from the factory.
The mismatch is random. It'* a function of rough sand-casting the part. Port-matching made a profound difference on my SSEi and a bone-stock 1994SSEi as a test subject. Improved top-end power.
We might have to break this out into another topic, but this is a good one to discuss.
Don't worry, I am not going overboard with the porting.
Before I do any grinding I will be removing my Gen III and carefully measure the head ports.
As long as I keep the inlet slightly smaller than the head port opening, there won't be a lip to create turbulence.
If anything, smoothing and slight grinding will really decrease turbulence.