I found this site when fitting tires for my Delta:
http://www.rims-n-tires.com/rt_specs.jsp
The online tool helped me figure out what would fit based on knowing what was originally on the car. I went from 225/75/15 to 275/60/15 on my new AR rims and everthing clears easily. You will need to do measurements, but this can give you confidence on what will fit. The 275's look awesome on my car.