"My 25-year friendship with Sonny Bryant made choosing the supplier of a crankshaft for this project a no-brainer. At $2,850, the crank is the most expensive part in the engine, but it's a work of art. Sonny used 340 Chrysler mains (2.499-inch), small Chevy rods (1.999-inch) and the final product weighs 64 pounds. It had small diameter counterweights considering the 4.125-inch stroke, and required 20 pieces of Mallory achieve the 2,100-gram bob weight. I decided on the 2.5-inch main size because the smaller 302 Ford size (2.250-inch) may have made the crank too flexible with its long stroke.."