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pinging
I've got a 1965 plymouth valiant i just put a new short block in and got it running but it doesn't idle smooth on the stock timing so i moved it till it sounded good and smooth the head is about two years old so i know the parts there are pretty good but when i climb hills it is pinging my dad says its nothing to worry about but i don't always trust him id like some mo opinions on the matter.
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