Crankshaft New Caterpillar 3306PC Forged W/G Stroke: 6.000 in Rod Size: 2.9987-3.0003 inMain Size: 3.4990-3.5000 in Flange: Flat, 9 Bolt Holes, 1 Dowel Hole Snout: Tapered, 1 Bolt Hole, 1 Keyway Notes: For Precombustion (PC) engines. Main thrust width on this crankshaftIsuzu 1.685 in. Front timing gear has 40-teeth andIsuzu L/H helical. See also part # 5423N