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Original Message
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RE: Need help with pistons. |
By bruce Thompson - 01/12/2005 6:47:00 PM; IP 67.101.28.186 |
390 w/428 crank is a 66-67 Mercury 410 now....pin height must go up 0.100' or 1/10" to take care of the upper swing(stroke) increase.....100 up more&.100 down more is .200 more total stroke...3.78" to 3.98"...410Merc slugs needed |
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