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24 Next to be bolted to the Funnelweb was a Holley HP Series 750-cfm unit. Yes, this is a vacuum-secondary carb, but Panhandle has used it on numerous builds from small-inch 302s to 408-inch Windsors with great results. The main drawback to this carb is the lack of a secondary accelerator pump for extra fuel on extremely fast throttle openings, but this will not affect dyno testing. When the dyno finished the pull on the Holley equipped engine the results were 515.2 hp at 7,200 rpm and 424.7 lb-ft of torque at 5,500 rpm.