Learn all about this engine here: http://blogs.hotrod.com/400ci-gm-ls-by-bes-racing-engines-at-the-amsoil-engine-masters-challenge-2014-145521.html
This Engine Masters entry from John Lohone is a 417ci late-model Hemi that made 668 horsepower and 589 lb-ft of torque during the dyno competition at the 2014 Amsoil Engine Masters Challenge presented by HOT ROD. Engine Masters is an annual shootout of engine builders in competition for huge cash prizes. For 2014, the Challenge is for two-valve V8s above 400ci, running on 101-octane fuel, and making optimal power from 3,000-6,500 rpm. The competition is held at the University of Northwestern Ohio.