A Matter Of Timing
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We used Crane’s 1.6:1 guided roller rockers (right) to replace the guided stamped rocker arms (second from right). The standard Crane roller rocker is at far left, with the standard style stamped rocker second from left. The guided rockers use “rails” to straddle the valve stem tip in order to center the rocker over the valve stem. This eliminates the need for a pushrod guideplate. Never use guided rockers with a pushrod guideplate. These Crane rockers are also a narrow body design to clear most centerbolt valve covers, but we still needed to grind clearance on the magnesium Corvette-style valve covers for the rocker arms. View Related Article
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