Seller notes

Features 180cc intake runner, 62cc exhaust runner, valve seats machined for 2.02" intake/1.60" exhaust valves, 1.560" max spring pocket diameter, Cast from premium quality aluminum that shaves 40 lbs. off the nose of your car vs. heavy iron heads, No accessory bolt holes, just like the original heads, Improved port/chamber shape for better performance with the 3-angle machined valve job that promotes better flow, especially at low-to-mid lifts, Designed for 4" bore 1962-86 small block engines (3...

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