027 Hi Po Engine Id Guide
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The Hi-Po's larger 1-13/16-inch balancer (stock is about 3/4-inch thick) was designed to help dampen increased harmonic vibrations encountered as the Hi-Po reach its rpm potential. Crankshaft pulleys are identical to other 289 V-8s and Hi-Pos only have a single sheave, or groove, as Hi-Pos were not available with power steering or air conditioning. View Related Article
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