My home inspection of Speedmaster heads

If you polish out those spots in the picture you'll be making the port bigger than it already is. Are you sure it wants to be bigger there?

Not sure about anything yet. Plan is to check the cross section of the clean port with a snap gauge and compare vs the ones with some as cast surface.

I'm smart enough to know what I don't know, so feel free to give me any feedback. I planned mostly a light polish vs any real material removal.