I'm not sure if it's worth worrying about too much unless we could dyno test back to back. If a 500hp engine loses/gains about 8-10hp from a change in the port finish that same change can be the difference in the effect the weather has on a tune up from one day to the next. I actually would be surprised to find anything more than that but I could be wrong. I had a set of heads I did for a buddy some 15 years ago here recently , they had bad seals but here is a pic of what my port finish looks like.
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