stock high of tires
front 25.1" tall you can run up to 25.5 with out rubbing offset
rear 26.0 you can run 26.9 with out rubbing

you can put a 235 on the front. 235/35-19 is side wall 9.3 ( the that is almost the width of tidth),,3.2 rubber between rim and ground,,and 25.5 tall ,, the 66.5 is the hubcentric( that makes the rim bolt AALL the way tight to the hub.
now if you use a 18 on the front then u can use 225/40-18,,,235/35-18,,,235/40-18
and you can put 255 on the rear 255/35-19 10 wide,,3.5 rim to ground and 26" tall you can go up to 285/35-19 ,,,,11.2 wide, 3.9 hight rim to ground ,,,26.9" tall rear must be offset 20 to 25 front offset The book says 35 to 42 i say 35 is what i would look for