I posted the intakes that would bolt to the year heads.The only std deck bastard is the 61-62 SD 306 Heads and matching intakes as they have 55-60 water pattern but use the 61-64 water by pass from intake to timing cover.Also the 991 61-62 2-4 SD intake has a removable freeze plug to allow it to be used with 55-60 and 61-64 heads.Tom
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