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These 1.7 ratio hardened steel arms have elongated slots to provide extra clearance for high-lift (.600") camshafts. This rocker assembly includes arms P/N 3959182 plus the ball and nut, for use on all 396-502 big-block heads with adjustable rockers. Technical Note: These long slot rocker arms are stamped "H".
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Chevrolet Performance Parts - 12675724 - Stamped Steel Big Block Chevy 1.7 Ratio Long Slot Rocker Arm - Single Replacement- Used On Aluminum Headed G
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