A Body LARGE bolt pattern rear brakes

I have Centerllines on the back that have dedicated lug nuts that fit the 7/16" studs, but have load-bearing shoulders that are of a much larger diameter for the holes in the wheels. I can get lug nuts with that same (larger) outer diameter that work with half-inch studs.

I think that'll work, since I won't be using OEM wheels.

Well the first thing you should do is get a 1/2" lug nut and make sure it fits the wheel because if it doesn't everything else is a waste of time and money .

Bill , dumb question , what tires are on those rims ?? if you are using a sticky compound tire you are just wasting money and time as you WILL break the stock axles eventually .