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Old 07-27-2014, 11:53 PM   #4
66Submarine
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Join Date: Sep 2012
Location: Dallas, GA
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Re: Need a little help and some add-vice.

About the overbore; do you have a good machinist's type ruler/scale? 1/32" is .03125, so the common .030 will be pretty much 3-7/8"+1/32"; if it's standard it will be 3-7/8" (obviously), so anything over that = overbore.
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