I agree that that will give you an accurate measurement , however its only accurate at the center line of the cylinder-if the block has ANY tip/angle to it at all from the 90 degree------ like for instance a 348/409 chev or the 383/410/430/462 Lincoln, Mercury/Edsel ?????????


On about every chev engine I have done, it is pretty common that they are tipped aprox .010 and up tp .020 front to back. They broach the block to surface them and I think it is because of the offset in the cylinders from side to side that as the block is forced thru the machine it cocks it a little bit------