That's great we usually only see those numbers on the 71 to 73 blocks.How many checks are you doing for each cylinder?Usually #1,#2,#7 and#8 non thrust to the front and back of those cylinders come up thin on those 74 and later blocks.
looking at the numbers the front and back numbers are consistantly a little thinner mostly in the mid to upper .200 range, when he checks each bore he will do 4 steps on the thrust and non thrust side and 3 on the front and back of each cylander.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
