Hate to say it, but if you're really wanting a good road course car, put an IRS in it. Live axles can be made to handle damn good (just see the Griggs and MM comments above), but a built IRS bring a new level of sophistication to things. Plus, except for a very small amount of fab work, it's damn near a bolt in. Use the '03 to '04 version if possible, much stronger to begin with.
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