Help me choose a tire?

215-70-14 is pretty much the biggest tire you can fit all around on 14" rally wheels, at least on a Barracuda (a Duster might have a little more space up front). 215-70-15 would probably be too tall. 215 would be the maximum width, regardless, based on the rim width, even though a 225-60-15 tire might fit inside the fender. So you could look at 215-60-15, assuming anybody actually makes that size. 205-70-15 seems pretty likely. The Tire Rack website lists dimensions for the tires they stock, which would include the most popular brands. Compare the diameter with 215-70-14 (should be around 26 to 26.5 inches, IIRC), and read the tire description for the minimum rim width required.