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I’m sure you remember the television commercials that ran a few years back with the Gomer Pyle-esque main character asking if the owner of the other character’s Chrysler-brand vehicle was powered by a Hemi engine. It’s a bit of a misnomer though, as the head shares more in common in combustion chamber shape with the older poly-spherical (or “Poly”) heads than the traditional “true” hemi-spherical (or “Hemi”) heads. Somehow I don’t think “That thing got a Poly in it?” would sell as many vehicles though. Continue reading →