Nice McCulloch MC 91A Block. Cylinder is 2.166. Does has the crack on the exhaust port rib, which is common. missing the side cover of the ports on the crank cover side as you can see. Could use a hone to clean it up. No Broken fin. Stock ports. . Please look at all the pictures to see overall. It’s in nice condition .look at all 20+ pictures to judge for yourself.