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We all like to brag about horsepower, but the reality is that torque makes a successful street motor. Torque production is what big-blocks are all about, including this 557-inch Ford monster. Never mind the peak of 615 hp, the torque curve exceeded 650 lb-ft from 3,600 rpm to 4,700 rpm and never dropped below 600 lb-ft until 5,350 rpm. Had we elected to run the motor below 3,500 rpm, the torque would have been equally impressive, meaning the biggest issue with this motor will likely be finding sufficient traction.