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That means the heads have been cut. I forgot how many ccs increase = 1 point of compression. Maybe the builders will jump in.
Maybe a CNC profile on the chambers is better than gaskets. Thay are cast chambers and have room for it. I don't know if thicker gaskets are available for FE.
Or better yet-improved, economical heads like Edelbrocks to lower compression.
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Chas.
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