who's Running 18 "s ?

I'm running 17's on a 65 Cuda. 275's on the rear and 215's on the front. The problem I had was finding rims with the correct back spacing as I wanted the tires to fit in the stock wheel well. I purchased a wheel rite from jegs to get the fit prefect. Measure lots!!
My rear rims are 17 X 9 with +24 mil offset which relates to 5.95 back space.