Of course you can BigMike. You just have to be extra careful to push the tire down into the recess of the wheel to get the bead to slide on. The normal way is the easiest but that is not say it is undoable the other. Go for the 2 backspace, but IMO I got those and would take the regular 10's back. It is too unstable onroad. You could order 15x10 with say a 3" backspace. As long as they are doing a custom deal on a new wheel the number does not matter.
If you really want I'll sell you my 8's with 2.5 back. I want to go back to 10's