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Thread: 4.0 head
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post #1 of (permalink) Old 08-29-2002, 08:50 PM
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4.0 head

I am boring my 4.2 .040 over, but first I need to select pistons. I have a 4.0 head to swap(not milled). Will a 4.0 head change your compression any on a 4.2?
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