I know others have had this problem, some of them running totally stock. My high rpm miss in second and third gear didn't start until I installed a turbo up intake from Jim in Florida. When I asked him about this he suggested I drop the spark plug gap from 0.050 factory down to 0.040. Well, I finally got around to regapping the plugs at 0.040 and what a difference! No more hesitation and that lugging feeling. Now the shifting is smooth all of the way to redline. My GT even feels quicker. I am very pleased. Thanks Jim
