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Senior Member
Join Date: May 2010
Location: Gardiner Me.
Posts: 4,200
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Do all those early 24 stud heads 39-42 have the same cc chambers? I know the A heads really pump up the compression on the 239 engine. I know you have to do a little cutting in the top of the valve pocket to use them on the 59 engine. I know the 40-41 heads have an A in the center, I don't think the 39 head do. Is that correct? Thanks Walt
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