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39 degree 425 Engine
Hi All: I reciently rebuilt a 425 from a 1966 Dynamic 88 for a customer and it has severe valve noise, but runs OK. I am in the process of rechecking the valve stem highth, and will install adjustable push rods, but I think I may have the wrong camshaft. I've been told that somtime mid year 1966 Olds changed to the 39 degree engine and this one could be 45 or 39 degree. How can I tell which one I have?
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