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The heads will be outfitted with Harland Sharp roller rockers in a 1.65:1 ratio. This ratio is more than the 1.6:1 ratio Chevy guys are allowed, since many Pontiacs shipped with 1.65:1 rockers. Our Engine Masters Challenge rules allow for ratios greater than 1.6:1 only if the factory engines shipped with more. Will it prove to be an advantage? Only time will tell.