Would 4.5 bs work on 17 x 8's?

[Mike70gtx]

I have the opportunity to get two boyd 17 x 8's with 4.5 back spacing. Would this work on front or rear? I would still need to get two more. If they fit on front, maybe I'd try to get bigger for back. Like 17 x 9.5. If so what backspacing for those? thanks.