The whippple causes the Gt to heat up even more .The car was designed to cool 550 hp not 700.There are some options for cooling .The Gt guys have a racing radiator which helps but is not a cure all.You can get rid of the AC unit and that will help.The Nardo car never overheated and it had no AC.There is also an x ford member who does the water squirting on the radiator and that really seems to help.The twin turbos will eliminate the cooling problem as well.Also you shuld run EVANS COOLANT It is the very best for cooling .Very popular with the drag racers.I have been using it for years my GT.MY 02 .Get ride of the whipple and get a pulley and dyno tune.