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The best running carbs we have used are modified Holley 9381 (830 CFM, with annular boosters). We mill the air horns and restrict the PV circuit. We also tune up the accelerator circuit (cams and squirters). This carb is very drivable, but will be down about 10 HP on a dyno to an 850 DP. In light weight cars with big engines I prefer mechanical secondaries. The other good thing about this carb is it is one of the least expensive Holley carbs you can buy.
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