What tire size will work with a 15x8 front wheel?

I found the 15x7 with a 4-1/2 b.s. Any thoughts if that will fit? It should, correct?

Also, what tire size would be applicable?

225/60/15. But watch the front bottom of the fender lip to tire when turning. Have someone turn the wheel and watch until it's at its closest.

Take the bottom front fender support and adjust it outward as possible. If more room is needed add a hole on the bottom fender flange forward of the original hole.

That should fit, a 15x7 with 4.5" of backspace is actually a +12 offset, so that's good, even better than the factory 15x7's. A 225/60/15 should fit as autoxcuda pointed out, and you should definitely check the front lower corner of the wheel opening for clearance. I ran 225/60/15's on 15x7's with 4.25" of backspace on my Duster and had to max out that lower fender to bumper brace, but that was all I did. The additional backspace should give you a little more room on that corner too.

You might be able to run 235/60/15's with that backspace as well, but since those would be 26.1" tall you would probably have to modify the front lower corner of the wheel opening to get those to clear. The outboard clearance to the fender would be fine, but because of the tire height the corners could be a problem. And your ride height and even your alignment would play a part in that as well. The 225/60/15 would be a much safer bet if you didn't want to worry about making any modifications to the corners.