Pictures of 29 or 31 by 15.5 tires

I just fit some 325/50/15 (27.8 diameter by 13 wide tires) on my 32 Ford this weekend (they are on my 63 nova) and want to go a little larger. The next size up seems to be 29 or 31diameter by 15.5" wide. Want another inch of backspacing too to cover up some of the axle and space between the backside of the tire and the body.

Does anyone have pictures or a link to a site showing cars with these size tires?
Here are what the 325's looked like that I fit on the car this weekend. the wheel/tire off the car is the 295/50/15's I am running now.

http://s104.photobucket.com/albums/m...25tires001.jpg

and

http://s104.photobucket.com/albums/m...25tires002.jpg