Wider tires in the back vs wheel spacers

I'm thinking my 76 2+2 might look better with a wider stance in the rear either from wider tires or use of wheel spacers. It looks like I could fit some 235/60R14s in the rear. Has anyone else went with this size tire in the back? I'll have to stick with narrow tires (eg, 205/70R14) in the front or I might not beable to turn the wheel at slow speeds. Of course I won't beable to rotate my tires. Or has anyone used wheel spacers in the back? One of the guys at work has an Infinity G35 coupe with wider wheels in the back and it looks very aggressive and sharp. But I'm not sure how this would work/look on my 76 Z. It looks like the BRE race cars had wider tires in the back. Obviously, Mr Brock would not have done that if it would adversly affect handling. Gary