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I have recently traded for a 53 CJ3B that has a 283 with a 4 speed transmission. My question is to get more cruising speed (55 - 60 mph) would I be better off having the axles re geared or swapping them out altogether? If I wanted to swap, what would be a good choice to use that would fit with the least modification?
I would go with a Saturn overdrive. If by chance you wanted to upgrade axles in the future, these OD units fetch top dollar even used. They claim they will handle 300+ hp. I think your weak link will be the Dana 25 front. Rehearing won't fix that. Just my 2cents
I would agree with Kootenay3b look into the overdrive first.