The curve on one end of the head it starts eating into from standard height. Looks really bad when you get 10 thou into it Looking at the inlet valve height it hasn't had much taken off.
And I meant the valve seals, not the valve stem seals. I.E are your valves actually sealing against the cylinder head or have they moved/bent/been compromised in some way. Much more hassle to sort when the heads back on again.