Small, narrow up front and wider, taller on the back was quite common back when I was in high school...won't say how many decades ago that was, but Kennedy was in the White House. We did it for the hot rod look...it handles worse IMO and you lose some mpg cause you're exposing more of the "brick" shape to aerodynamic drag...but it does look way cool. You also have to be careful of not going too small/thin on the fronts, cause those wheels carry the bulk of the truck weight...no curb hopping, etc.
No sorrys needed, honest mistake. Would 235-75r15s on the front with 255-70r15s on the back look good, that way I get a little wider in the back. I do use the truck as a truck every once in awhile. I am also looking for that hotrod look on my truck that many seek out in highschool. Thank you very much for taking the time to help me out