I agree Al that the tunability is there and the wide body blocks alleviate the tube for more available volume but MOST of us don`t need it but hey, its your money. Please explain how Mark`s 2-circuit beat out everyone`s 3`s AND accelerated better on the accelerometer on the dyno? I converted a 3 for a local guy and he went from 900+ at the tires to 1040+ on 1 kit............Jason and I debate all of the time but w/2 small changes on the dyno Mikey`s motor was smooth as silk and even J was impressed fwiw. We will test the 2 to 3 theory on the dyno on a 850+ smallblock by years end w/an 1150 dommy and compare notes and curves cos I`m all about learning and knowledge is power for all of us..........