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Unfortunately, most everyone here has the 3.6l. I don't believe their power mods will work with our 3.8's (it would be nice if they did).
According to all the online charts, 5.38 would get you close to where you want to be but keep in mind, if you want to do a power mod at some point, you should do it first before gears.
I don't remember if you have a Rubicon or not. If not, 5.13's will be as big as you can go in a standard Dana 30 axle. I would figure if you are planning on 37s then you either have a Rubicon or are planning on beefing up the D30. I'm in the same predicament as I have an Unlimited X and want to go to 37s.
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