I havent measured head warpage but i noticed this when i flipped the head over. the seats appear beat up pretty bad, but if its worth saving its cheaper than buying a new head. it appears to be a chunk missing from right around the edge of the valve seat. I am wondering if a good head shop can fix this and install new seats. if so anyone got a good recommendation on a shop that can do this? the seats in the head are aftermarket, any reason why they are beat up so bad? the chunk missing that im talking about is the top side of the lower seat.