If you are planning on installing a small lift, go with a 33x10.50x15. The 31s will look small on it.
My uncle used to have the exact same truck, but a 95. He had a set of Mud dawgs on it. I can still hear those tires coming down the street.
I think I'm going to skip the lift. It sits pretty nice like it is. I think it will look even better with the slightly larger tires on it.
Plus it has the 3.08 gearing and 33" tires would make it even slower with less power to the road.
My 2018 Ram 1500 with the 3.6 liter V6 and 3.55 gearing feels like an Honest to God Hot Rod compared to the 1994 F-150.