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Old 01-22-2007, 04:04 PM
joe_padavano joe_padavano is online now
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You shouldn't need longer pushrods, since the valve tip installed height should be identical. Unfortunately, most machine shops don't know how to set up Olds heads correctly and chances are the valve tips were set wrong when the heads were machined for the larger valves. The Olds specialty houses sell a tool that allows you to check the valve installed height using the same process as the factory service manual.
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