Hey guys i have a 99 f150 which already supercharged and im pushing right at 425 horsepower really wanna get 500 out of it other than the super charger nothing has been done to it....What heads would be best for it? what size throttle body to help air flow? is there a performance intake for it? and i already have a diablo sports tuner on the way which should help and a pulley system as well thanks for all the help in advance guys!

 

id be worried about the rods... stock rods and an SC are ok, but im sure youll need to add boost to get 500. i think these blocks are good to about 500 anyway. why push to the limit and risk it?