gears for duster 8.25 help

The ring/pinions will swap out. I have 3.55's from an Jeep cherokee in my 70s 8.25 + a trac-lok diff from a jeep of some year.

You just gotta watch out because the later carriers had a different spline for the axles.

www.ringpinion.com has 3.73s for these axles if you want to buy new. Not sure if you'll find a factory application though.