I have a 275/35/18 square setup on my 72 Dart swinger...im running 18×9.5 Enkei NT03+M wheels with Hankook Ventus R-S4 tires. The rears are a 38 offset and fit perfectly with the Explorer 8.8" @ 59.5" wide and the Dr. Diff offset kit. The fronts are a 27 offset and clear everything and no rubbing the frame.

My aluminum brake rotor hats are 0.250" thick front and rear so thats factored into it too. Without the hats on the tires would just be a hair from rubbing the frame in front and the leaves in the rear.

My next tires will be 285s as my offsets are bang on so i coulda gone bigger but i was playing it safe for the first ones. Also my tires dont measure out as wide as the spec sheet said they were either.