Butch,
If you don't like the clearance issue why not contact NL and let them come up with a solution. They may sell wider brackets that would then be a bolt on solution. You can't be the first person that put one on a dually. On my dually my camper jacks only cleared by an inch on each side. If you remove or load the camper on asphalt or concrete it is not that big an issue. If you are loading it on unlevel ground or gravel, it can be more of an issue.
I think I see a solution with a wider bracket on the NL, uses the same holes, uses the same bolts, etc. It would just move the jacks out an inch or so. Maybe NL has those available.