67-69 Dart front wheel backspace question?

I run 17x7 fronts with a 4.75" back spacing. I had the big Mopar set up front but switch to Dr Diff 13". They fit just fine with both. Like 72' said 4.25 to 4.5 would be fine, but, good luck finding that back space off the shelf, its limited. I had to go custom.

205 is too narrow for a 7" wide rim. 215 Minimum, 225 is ideal.