Block machinist Sal Alcaraz warned us to pay close attention to the orientation of the main caps. The tabs on all but the rear cap face the rear of the block. Our caps were all scribed with arrows indicating the orientation relative to the front of the engine. If yours are not, mark them before removal. Also note that the block is shipped without the main cap’s inner and side bolts. You will need to buy the missing pieces or upgrade to ARP fasteners.