Advice asked for widthening rims on a 70 Duster

@halfafish: that is very cool, thnx, i love the stance with the 205/70 combined with the 245's. It makes me wanna go to 7 inch with a 235, 245 or 255. In front i will need to go from the current 205/75/14 on a 5.5 J rim to a 205/70/14 on that same rim. In the back I can easily go from 5.5 J to 7J. The added one and a half inch on just the outside of the rim cannot be stretched to 7 and a half I guess? Backspace will remain stock

Btw: what does SBP mean? Small bolt pattern I guess?