K50 Cummins Cylinder Block 3178803 Parts Catalog Ref No. Part Name Part No. Required 1 Cylinder Block 3178803 1 2 Plain Washer 139990 18 3 Ring Dowel 3176857 9 4 Plain Washer 3025485 18 5 Bushing 205230 34 6 Fracture Resistant Screw 3628452 18 7 Twelve Point Cap Screw 205584 18 8 Main Bearing Cap 206587 7 9 Main Bearing …