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My current combo is a holley 174 roots type charger with a holley hp1000+cfm carb a/f only changes one point from summer to winter love the combo gets 17mpg with a c4 and 3.55 gears at ten pounds of boost and ran 6.85 at 107mph with a 1.73 60ft at bama two weeks ago spinning like mad . But always looking for ways to go faster.
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