I have a hidden hitch like yours and the inverted ball just hammered through the ABS wireing on top of the differential, hidden hitch failed to mention that in their literature. I've got an 03 Ram 3500

 

i have the b&w turnoverball and no problems at steep angels with my 265 size tires. 285's ar only about 1.5 inches taller, should not be a problem.

 

I installed a B & W turnover ball in my 2500 and love it. I also have 285's and have no problem with my 30' GN Flatbed. I did have to adjust the coupler to level it out. It was easy to install and is made in Kansas. I reasearched it pretty good and am happy with it.

cole