This goes beyond just 2r. I've been toying with the idea on cast post war cars with straight axles ever since I got some modern cars with ball bearings and my car limits more than doubled.
A good axle seat in the i.d. (long enough) may enable a mounting similar to a "pillow block" if your good at machining (powered or by hand). It would let sprung axles achieve an angle too. Pin the race o.d. at 9&3 o clock ?