Vigilante Performance Engineering 4340 Forged Steel Crankshafts for the Ford 351 Cleveland and are available as 3.500, 3.750, 3.850, 4.000. 4.100, 4.170, or 4.250 stroke versions. They are each offered in either an Internal or External balance design and come as a Standard Weight crankshaft which is suitable for high horsepower usage. Cubic inch displacements range from 351 to 454 cubic inches.