Thanks for the help guys! To be clear, my tires have about 1/2" clearance from the inside edge of the tire to the unibody at the height of the center of the axle, but it is flexing the lateral link bushings enough that I'm rubbing pretty aggressively there. Also, due to budget concerns I'm running a 255/40/17 BFG Rival (yes, 200TW) and having these issues. Can't imagine how it would be with some purple crack of modest size.
5x114.3 knuckle conversion is in the plans, but it will be a big expenditure so for now I'm getting good at pressing wheelbearings. haha.