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I am replacing an old timing chain and gear set, with a new Edelbrock doub;e roller set. the old gear(Cam gear) has a off centered hole in it, and then new one does not. The hole in the old one, is drilled at an "Angle" not straight through like a drill press would be able to do. My question is, Is the hole maybe for " Oiling" something, and if so, do I need to have a hole drilled in the new one to match ? thanx. scott

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