3" drop spindle/control arm clearance issue

[bagged74]

I have used DJM 3" drop spindles before and had to do some grinding on the spindle where the caliper mountsto get the factory rally wheels to work. I just installed a set of 3" TrailMaster spindles that I bought off Ebay. I had no clearance issues with the spindle itself, but the wheel is hitting the control arm. I did some grinding on the end of the arm itself to clear the wheel. The problem is that the wheel is hitting the control arm when I turn. I dont really want to do a lot of grinding on the control arm as I wont be running these wheels for long.
Can I use a 7" rally wheel to get some more clearance. I know they have 1/2" less backspacing which should help. Does anyone know for sure?