I use the one that gets the tire away from the body the most with the 4.0 wheel.
I have run ones that put the tire closer in the front. I did it for short course racing thinking it would help in the tight turns. It seemed to work good. But also rubbed on the bump stops pretty good. I would not trust it in a long race unless I adjusted the steering stops. Also it could affect how it fits in your spare tire mount. They wont fit in mine. So I stick with the same.