I would pul the motor and go with a 4.6.... but that's just me. Anywho, a good tune from blue oval chips will help you out, an make sure the car has a fresh tune up.
Stock 96 block with 04 gt heads & intake, 03 gt intake tube and MAF, along with a 180 deg stat and mild j mod...
Mandrel bent catless 2.25" true duals with dynomax super turbos
Vogtland .75" drop springs with sport / cobra shocks
XCAL2 with custom dyno tune
Car is officially for sale... call me...