my 98 gt has just a lil over a 100k (runs really strong and my mods are great) and i really wana tune her up......i changed the fuel filter, got ford racing wires, platnium plugs, and new coil packs. But she still idles a lil rough.....first question is....im goin to change the pcv valve....wanted to kno where it is on a 98 gt...second was gonna do that thing wit the seafoam and run it through the pcv....what opening do i run it through.....and what else can i do to tune the car up and make it run almost new....