Oster removed the main bearing caps and lifted the crank out of the block. We'll use the same crank, but first the scores must be removed. Our crank will be undercut .010-inch and thicker bearings will be used to retain the proper clearance. Having a crank cut means the journals will be machined until they are smooth and round. In addition, the crank will be checked for cracks and the oil holes will be chamfered.