I wrote a chapter in my B-body book on modern wheels and tires so you might start there. Basically the trick is to stay with an overall tire size that is close to the largest size that the factory put on the cars. If you do that then the car will look "correct" since the tire size fits with the body style.

You can break the rule if you're willing to lower the car or move other things around, but generally you do want to stay with the factory tire size.

Wheel size doesn't matter much as long as the tire size (diameter) is kept close to OE. For most Mopar cars that means that you need a 27 inch diameter tire to fill up the wheelwell. The cars can look funny if the tire diameter isn't close to 27 inches.

The 235/55-17 tire is close to the same dimensions as an old G70-15 tire which was used in the muscle car days. The 17 inch wheel gives you enough room for a 13 inch brake package which is far superior to the factory disc brakes. Since the tire is basically the same size as a factory tire the overall look will be roughly the same. If you use a fairly conventional looking wheel then a lot of people won't even know that you have 17 inch wheels on the car.