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That does help. there are a lot of little things that can affect the idle. The tors could have gone bad, all sorts of carb issues could cause it, air leak will affect it too. 90% is not good enough for an airleak. you must do a leakdown. I know it's a pain in the butt and you will probably find something wrong that won't make you happy. but better than blowing it up in a couple weeks after a fresh rebuild