Trick Flow Specialties built the 598 cubic inch big block Ford engine that was part of the prize package awarded to the 2013 IHRA Top Class Champion (Tim Lucas of Lillington, North Carolina).
Building big cubic inches is easy to do with a Ford 460-based engine. With a 10.320 inch tall deck, generous 4.900-inch bore spacing, thick cylinder walls, and a huge crankcase that can handle lots of stroke, it's like Ford engineers designed the 460 just for building big-inch engines. The cubic inch limit is about 557 with an OE-style 460 block. Ford Racing's popular siamesed-bore A460 iron block can handle about 598 cubic inches (4.600 inch bore, 4.500 inch stroke) without a fuss, providing a good balance of size, power (especially torque), and parts availability. Thus, 598 is the direction we went.
See Part One of this engine build at OnAllCylinders.com: Big Ford Horsepower Part One: Trick Flow Specialties Assembles 598 Cubic Inches of Short Block