Any benefit to 10” wheel?

I can't help with tire pressures, but I'm sure someone will chime in. I was wondering what the width of your Dana is? Are your springs offset?

I'm trying to put a 15X10 wheel with 5.5bs into my Duster. My 8 3/4 is stock width and the springs have been offset with the Dr. Diff kit. I'm not afraid to grind the lip of the wheel well if necessary. I have 7" between the face of the drum and the leafs, and 4.5" between the quarter lip and the drum. I was planning on running a 275 tire and the way I'm seeing it, if I run a 5.5bs wheel that will put the outer edge of the wheel in line with the quarter lip. Was wondering if anyone knows if this combo would work?

@MomsDuster let's see some pics of your new wheels?