Quote:
Originally Posted by Jim Yanoski
Do yourself a favor and buy the 9.5" the first time! Lamb stocks and Tom's make 3.89 9.5 gears I don't know about anything higher. Also make sure the rear housing is clearanced for the 9.5 ring gear before you clean it all up after the fab work. 9.5 gears will not fit in a stock 9" opening..........Jim
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After talking with you, Travis and my chassis guy, I've settled on 3.89 rear gears. At this power level a 9.5 ring gear wasn’t necessarily required, but for an additional $234 I figured it was worth it.
Good site for RPM, Speed, Gear Ratio Calculator
http://vexer.com/automotive-tools/speed-rpm-calculator