How Tall a Front Tire Can I Go On My 74 Duster?

I had 225-70/15 Goodrich T/A's on factory style rally's and they really filled out the wheel well very nicely. However when backing out of my drive way I got a slight fender rub when cranked all the way to the left. My driveway had a fair grade, and that is the only time it ever rubbed, backing out of my driveway, nowhere else. :lol:
Are these on a Duster? Sounds promising.