On the port work - My approach has always been you can help the air go around the pushrod turn area two ways. The goal is to add a small amount of volume: You can push back the PR-side wall and thin the shared wall side (widening the pinch). Or, you can smooth the casting flash and blend the curves from the port entry (gasket size) to past the PR side and spemd more tim on the shared wall side and roof. I raise the roof slightly (leavin the gasket size at the flange), push back the shared wall slightly, and reduce the radius on the shared wall-to-roof intersection. The intake charge predominantly uses the roof and "inside wall" (the pushrod side) so by smoothing these but not creating a small radius "corner" on the roof-to-PR wall intersection you dont add dead spots to the flow. That's an approach that works for me on a street or high torque head where the cam will be medium to moderate size anyway.
On the intakes - In my experience the Wiend intakes are no better than the RPMs in terms of port match up... They all have accurate ones and "off" ones they ship. The last one I had was horrid before I fixed it...lol.
