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Old 10-29-2006, 02:11 AM   #6
skokie
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Join Date: Oct 2003
Location: San Jose Ca.
Posts: 3,354
Re: speedo gear ??- Experts help!!

Im running a 308 with a 400 as well. Tires are 29.5 in diameter and I have a 17 drive gear and a 39 driven gear.
Check the following sites
http://www.700r4.com/speedoCalc/speedocalc.shtml
http://www.bgsoflex.com/speedo1.html
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68 build thread
http://67-72chevytrucks.com/vboard/s...d.php?t=223234

Last edited by skokie; 10-29-2006 at 02:11 AM.
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