I have a 96 gt with basic bolt-ons. I installed screaming deamon coil packs this past weekend and gapped my ngk platinum plugs to .065 as instructed but after driving it for the first time after the install, my car started shaking and misfiring under a hard pull such as in low rpms and up hills. When I got home I turned off all the lights and looked for sparks in the engine bay. I have three spark plug boots with sparks jumping from them. I have ford racing 9mm plug wires on it too... Do I need some dialectic grease or something? Or could I need to to gap my plugs smaller? Please help!

 

Have you try to move the wires around.those boots maybe bad. Yes use the dielectric grease also.