what are you running for a cam in that? something like this is what I'd like to eventually put in my duster with my A833OD/3.23's/27" tall tires...though I am smitten by the Aussiespeed Hurricane long runner manifold....I'd be looking for idle-5000 RPM performance....was originally thinking 2bbl, but a small 4bbl might actually be more economical in cruise with the smaller primaries....not much in the way of progressive 2bbls out there....