There is nothing different. The best, most effective route is to blend the valve pockets (bowls) to achieve a smooth transition from the "as cast" port. Do a rough three-angle valve grind first, and then blend the bowl into the lower 60 degree cut. Remove any other casting flash, and don't be concerned with hogging out the runners. Just get a good smooth profile from the square port to the round valve seat area. I also back-cut the intake valves - I move the intake valve seat contact point higher on the valve face, and then put a 30 degree back cut on the valve to ease the transition from the neck to the face.
This way you achieve 80% of the improvement for 20% of the time.