For the last time it is all avail.in the AR Perf options catalouge and Techspecs!! Stop misleading people that this is some sacred data that can not be found. My gosh. Ask any expert who has a set and they can help you out. I can provide you about five who have already done this work if the manuals don't help you. I have a set thank you.I guess you are the only one in the world who knows the correct info, disregarding everyone elses work, including all the engine builders listed. A self proclaimed guru, and you are the only one that knows anything. Unreal really.