head may need skim, worried about the raise in cr
 

hi ihave looked at my cylinder head with a ruler ontop at different angles and see if any light gets through and there is some obvious gaps where light is getting through. so i think i might need a skim. how much will this affect my cr. im going to be running 9:1 pistons with boost, will a skim ruin my efforts of lowering the CR.
thanks, Tom