2.5f/2r is a great for spirited driving without too much tire wear. Stick to zero toe. Lots of people do the two bolkt trick, including the entire SCCA SSC solo cpec class. SPC bolt in the top, move the topo bolt to the bottom I think it is. I don't have personal experience as I've always had camber plates so verify the bolt setup. Depending on tire size and wheel offset, you may get less camber before the tire is too close to the spring perch. Or more.
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