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Anywhere from, say 80, to 180lbs. What you are looking for, really, is a difference. One that is 30, to 40 lbs., lower. A good small block, with half life left, should come in around 120. A new motor, 150, a high compression race motor, 160, to 180. Anything below, say 80, may require attention, soon.

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14y ago

What else can I help you with?