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I'm running a 4 cyl class that has no tire rule. The track is hard dry slick 1/4 mile banked dirt. I'm running 15" wheels, would like to stay with 8" or 10" wide wheels. What recommendations do you guys have? I don't need so much grip it boggs the engine but also want to get around the track with as much grip as possible. The car is 2100# leaf springs 2300 Ford iron head.