Also look for cracks ---#2,#3 ex valve seat to bore, and where the center head bolt (between #2#3 bore)--2 of+ the diamond blocks I have also have a crack there and the block deck is pulled up there, the crack goes from water passage --stud---water passage -- I would think that it would be a hard crack to make strong enough to pull a torque and not move the block deck (may have trouble sealing headgasket around those 2 B only water holes that A doesn't have)