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Is a 21A flathead desirable?
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12-26-2010, 08:53 AM
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41Fordor
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Join Date: May 2010
Location: Cheyenne WY
Posts: 187
Re: Is a 21A flathead desirable?
Can easily be bored to 3 3/16 (239 standard) with the sleeves removed. With the smaller heads this gives a good compression ratio. That's what I've got.
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