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The ProComp dual-plane intake was run with a Holley 750hp carburetor. The HP Holley was equipped with a Percy's Adjust-a-Jet system that allowed for easy air/fuel adjustment. A touch overkill for the mild 302, the 225 Pro 1 heads produced peak numbers of 399 hp and 370 lb-ft of torque. Torque production exceeded 350 lb-ft of torque from 3,300 rpm to 5,700 rpm.