Will these fit?

I don't see why not. No mods so I'm assuming you're still SBP up front? I ran 225/60/15's on my 15x7 cop rims, which had a 4.25" backspace also. But the BBP brakes have a wider track, so on your car it wouldn't be as tight as it was on my car. 225's should fit fine, 215's would be easy.