I am a bit concerned with your suspension set-up. I think you should have invested in some 60 series axles with Longs (at the very least) & relocate your coilovers. Forget 46's it will never happen
with your set-up & wheelbase (especially if you consider it to be a rock crawler, I think 40's are going to be pushing it. If you are stuck with the 40 axles I would look at notching the frame maybe.
What wheelbase have you got & have you even considered this ?
brooksy