Generally M715 owners swap the whole axle assemblies to CUCV axles or something similar because of all the added benefits. 8 lug wheel pattern, disc brake front axle, cheaper possibilities for rear disc brake swaps, better/stronger axles, parts availability, more streetable gearing and wider gear choices, better turning radius with an open knuckle front axle, etc.
There are just way too many benefits to swapping axles than just rim choices. The only good reason to keep the stock axles is lack of cash or a stock restoration. Considering that custom rims can run as much as $1000 and a set of CUCV axles can be had for not a lot more, it seems strange to even waste time on the old axles. Also consider the fact that a modern Dana 44 front axle is quite a bit stronger and better engineered than the stock Dana 60 front and the choice just becomes common sense.
Just my .02