Originally Posted by
cny-bikeman
I doubt very much that caliper can be made to reach that rim properly.
That's entirely possible. But the OP won't know until and unless he properly centers and balances the brake to eliminate the Hi/Lo issue.
If the reach is still a bit short, he can buy another few millimeters by either extending the slots with a rat tail file, or shaving the tops of the shoes so they don't touch the tire.
But it's premature to solve a problem before you know if you have one, so step one is properly mounting the brake so he knows the real situation.