"What's the largest size tire I can run without rubbing?"
The age old question with the broadest of answers in thread after thread. "It depends".
Well if you want to beat the dead horse again, join me in the saga to fit LT 265/75/16 A/T tires on aftermarket 16 x 8 rims 4.5" backspace and 0 offset.
1995 Club Wagon Chateau, 5.8L 3.55 Trak-Loc, factory tow package.
I recently replaced my long ago worn out and stock 1,685lb 2/1 leaf springs with ATS 43-1033HD 2,250lb 4/1 leaf springs. Pretty sure my prior height was well below stock as I gained 3" before settling.
This last pic with with new leaf springs, and still factory front coils.