Re: couple of questions on wheels/ tires (brdd)
I have that combo on my 89 coupe.
275 front, 315 back.
You will really need to run the larger tire in the rear. the 275 will fit, but A: it'll look bad, B: the sidewall will not be square, and thus unable to do its job properly. C: handling will degrade.
My car (see sig) is stock ride height and I have never rubbed with the 315s, and I have the "soft ride" suspension, so baby rolls a bit.