Did they check the tolerance before they threw a brick at it ?
It should be gleaming fresh looking and I'm guessing they didn't take the valves out either
It been mildly ported, new valve guides, new stem seals, valve seals recut and the valves lapped in. It was then skimmed and chemically cleaned.
They also did my block and crank and balanced the whole bottom end, which all seems good from what I can see.
It didn't need a skim as such, just got it really lightly refaced so it was clean and had the best chance to seal, or so I though!