The limiter will be the VP44, then once you have the stage 2 pump the turbine wheel/housing will be without some kind of external wastegate. The Scheid stage 1 pumps are basically just like any hot rod pump out there and don't flow anymore than SO pumps(basically a hybrid of an SO and HO pump or has extra fuel and timing just like any tuning module will do). I'm sure the truck runs great and makes respectable power but there is only so much power that you can make with so much fuel regardless of injector or turbo size. A matched setup will make the best power, anything too small or too large will hold it back. If you wanted to figure out your power you could get the truck weighed and time your quarter mile.