Well it came with them, the gentleman I bought it from had them on there siting that it was the only modern rim that would fit on it. So simply providing more vertical clearance might not stop the rub?
You still need to check where they're rubbing. Depending on where it's rubbing, you'll have to determine if the best course of action is a lift or smaller tires, or a different wheel offset.
Look under it with the wheels straight, and cranked each direction to see where it needs more clearance. You'll be able to see what the best course of action is for you.
