As nice as the rear tires sitting even with the front will look thats a bad reason to do it. Rear wheels that are inset havr an advantage over non due to the rear wheels not following the same complete line as the front. My 89 ramcharger would go twice as far in a 4 ft mud put with near bald tires as my buddies who did just what u were saying. I also went threw snow better that way since my drive wheels werent completely hitting the packed surface my front tires made
BUT:
The Comanche front axle is the same width as the rear axle, so stock they DO follow the same complete line. They are inset because the body is wider in the back than it is in the front. So the wheel spacers make them sit out more, which according to your logic makes it better.
Touche. Did not no that. New things learned every day! :thumbsup: