i'm about finished with my setup (gt4202, tial 44mm, w/g tial 50mm bov mmr950 s/b and worked over aviator heads) and the only thing i'm missing is the intake. now i know i can go 99-01 cobra or 03-04 mach but has anyone done a custom upper on the stock lower? Is there a reason it hasn't been done? could i use the procharger upper without the air to water setup? is the "empty void" in the lower not enough of a restriction? just trying to do something a little out of the norm if possible, thanks.