Faithful reproduction in OEM thickness stamped steel includes correct timing tab with "A O R" markings welded to cover as original. The 66 cover has a provision for center bolt to go through the oil pan to timing cover. There is no hole for locating dowel pins. Not a low quality generic aftermarket cover. OE Quality technically correct superior reproduction of original. EDP coated black. Seal NOT included. GM Part #: 3882820
