Those will be awfully short! Almost 2" shorter than the tires you're running now. Take a look at this tire size calculator. You can plug in both your current size and new size and see the difference. It also tells you how far off the speedometer will be when you change tire sizes. Personally, I'd go with something more like a 215/70/14 on a stock 6" wheel.
14" tires are getting pretty hard to find these days, and the selection stinks. 15" or even 16"s are much more common. Remember that your Cat uses the same 5 on 4-1/2" bolt pattern as many more modern Ford cars, so finding a 15" factory wheel you might like is easy. I bought a pet of '98 16x7 Crown Vic aluminum wheels for one of my cats,