American Racing Outlaw ii Rims

Most people use the same size wheel on all 4 corners. Some, like the old school big and little look with 14's up front and 15's at the rear.
15's have a wider selection of rubber to choose from. Figure out your bolt pattern. 5X4 or 5X4-1/2.
Tire sizes and widths can be found in another thread in this "Wheel and tire forum."
I myself have 275- 60 - 15's on a 4 inch (or less) back spacing on my '71 Duster.