2nd gen Dodges that would have a 60 and an 80 are 94-02 1-tons, (all 1-ton 2nd gen trucks were duallies though, so that may pose a problem) and manual transmission 94-02 diesel/V10 3/4 tons. Automatic diesel/V10 3/4 tons had 60 fronts, and 70 rears.
Not sure, but I think 60 fronts were an option on the V8 3/4 ton trucks, but I don't think they're very common.
Keep in mind that the front axles all (except a few '01-02) had the CAD (central axle disconnect) which means the long-side front shaft is a 2 piece jobber. Just like Jeep YJs and many XJs/MJs. Not typically considered heavy duty...
I think they're pretty wide (70+ inches) so street legality may be an issue, but for a crawler, it could be a cool swap.