15x7 4.25 backspacing on the front. Does it work?

I'm currently thinking about equipping the front with 15x7 steelies.
I currently have 205/65r15 Steelies on 15x6, but I would like to switch to the Vitour Galaxy tires like the rear, where I have 255/60r15, so I have the same white lettering.
But I "only" have the choice between 215/60r15 which are slightly smaller than the current 205/65r15, or 215/70r15 which are probably narrow, or 235/60r15 which are not much larger in diameter than the 205/65r15.
My 70s Duster has an after market disk brake kit with bbp installed.
what are your experiences? :-)
I'm currently leaning towards the 235/60r15 on the 7x15 rim :-)