Tire and wheel size.

Asked these questions but think I did it in the wrong place. Trying again here.
Have a 64 Valiant. Picked up wheels, Aluminum Indy Slots, 14X6 and 14X7 small bolt pattern. Back of car is raised by a couple of inches. Can I run the 7 inch wheels on the back? What size tires can I run without fitment and rubbing issues? Thanks in advance for any info.
Chas