427 yenko all aluminum block
Hey everyone. I am new to this forum and have come here seeking more information about the yenko all aluminum blocks that were built back in the 60s and 70s. I recently purchased a block that has yenko on it and is supposed to be an all aluminum block. It only has 4 letters on it "SYHE", and says yenko on it. Does anybody know what these letters might stand for or have any other information that would be useful?
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