It will be fine. As donn said capacity must be sufficient for load. It's half in inch or so smaller radius depending on tire manufacturer so it's going to drop that end of that axle by a half inch. In theory as one end of an axle drops and the other stays the same you will be applying a twisting action or side force to the dogbones and pivot bolts.
It's also not like putting 2 different size tires on a drive axle and having the differential gears spinning at different speeds.
You also already realize that it should be for very limited miles.
