Back spacing and tire sizes

I want it to look good but I don’t want any problems with it. 245 -70-15 or 265-70-15 if I can run them without have a problem with clearance.

Those 70 series have huge sidewalls. And quite a bit a bulge. You could go 245/70/15 4.25” backspace 15x7. Or 15x7 with 4.5” backspace if off shelf. Then thin spacers as needed.