prairiehotrodder said:No 9" can just be bolted in without narrowing. So once its built to fit a G-body I run a 15x8 wheel with 4" backspace. A 3.5" backspace will work better if you are running a tire with lots of sidewall bulge. Another option is a a 15x10 wheel with 4" backspace if you run a 26" tall tire and the back of the car is stock height. I have this setup on a 78 Lemans and it looks kinda "Ghetto" but don't put anyone in the back seat or the tires will rub.
Brian
prairiehotrodder said:you want 5x4.75 to match the front of the car. 5x4.5 is ford bolt pattern. Some wheels have both so that could work for you.