The most popular stroker for the 351W is the 393. Perfectly suited for a variety of uses from street to pure track excitement, the 393 is a great combination for any Ford car or truck. If having an easy-going high horsepower engine is something you would like to achieve, the 393 is perfect for you. 4.000 to 4.030 bore - 3.850 stroke - Flat top piston - Forged steel crankshaft - CHP 4340 forged steel connecting rods - Probe SRS forged pistons - Dished and Blower Dish pistons available