i am not very good with clutching, so i have to ask the question. will i be able to run stock helix, and get the best performance, at 6-9000 ft.? i have a 06crossfire with a 2 in. and the chart under the hood says i have to change wieghts, springs and helix. the set-up now is stock for 0-3000 ft. any other clutching set-ups that you are doing at that elevation?