FP i have all the tire sizes and can tell you what will fit example : the 255/35-20 = 10" wide ,,3.5" rim to road and 27" tall and they will fit best to have a lip of at least 2 to 3".
the stock tire is 10" wide 3.5" rim to road and 26.0 tall
265/35-20 is 10.4 wide,,3.7 rim to rode and 27.3 tall will work with stock suspension
295/35-20 ts 11.6 wide 3.5 rim to road and 27.0 tall and will work again you need at least a 2" lip

hope this helped ,, jim