Design a gas-powered V8 built for strenuous duty, hauling heavy loads day in and day out, with diesel-like durability, performance and power. The result is the overhead-valve, port fuel-injected available 7.3L. This big-block “pushrod” V8 with variable-camshaft timing reaches peak power with optimal air-fuel ratio in the low rpm range, providing the responsiveness and that power commercial applications require. And for the durability also required, the 7.3L features a cast-iron block with four-bolt and cross-bolted main bearings plus a forged steel crankshaft. Want the biggest gas V8 with the highest torque output, rated at 335 hp and 468 lb.-ft. of torque, available in a Chassis Cab?* This is it.