When you have a big throttle body, it makes the throttle tip in very sensitive. Maybe even un-drivable if its a street car. I prefer, on any engine making north of 650hp, to use a progressive TB...Like a four barrel with progressive linkage. Drivability will improve. An engine will only use the amount of air it needs, no matter how big the TB is, so one that is sized a little better will give you better control. Just my 2 cents....

PS...That is the best bang for the buck engine out there right now. Thought about putting one in my Duster. Very well thought out engine, and the power it makes shows this.