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On the backside of the block directly above the camshaft is an oil transfer galley, similar to that found on '99-and-later blocks. In our application we tapped these holes and blocked them off. On the front of the block, we ran a set of restrictors (0.020-inch) to limit oil flow in the top end. Several engine builders, including Vengeance Racing, believe this is key to maintaining good oil control in the bottom end. World Products recommends running a 0.020-inch restrictor both front and rear. View Related Article
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