A forged-crank 283 had little more than a harmonic balancer hub ... because those mills were intended for road racing. The 400 small-block, with its 3.75-inch stroke, used a unique 8-inch balancer ...

We decided on this system for our 383ci Stroker SBC from BluePrint Engines. This model makes 430hp, and we added a Professional Products harmonic ... chose to use ARP's Balancer bolt.