Look for threads on Dodge Durango alternators for XJ, should be an option for 160A for a relatively good price from Rock Auto with only minor grinding to clear a bracket. Would be best to upgrade your battery and alternator wiring at the same time though, I’m not planning on doing my upgrade without this (4AWG minimum)
Wiring kits are available ready to go or you can DIY. Try
http://www.geocities.ws/jeepi6power/electric.html
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