hey! like was said before. you need to watch how you do when you go much bigger than 17x9 on any of these fox cars, especially a dropped one. there are so many things that are involved in what it will take to actually run something like that. weakened factory springs/lowering springs, caster/camber plates, tubbing, control arms,brakes, and a million other things. also what you use it for. if you are doing a race/ pro street, just tub it and run it and you will be just fine, but if you want to put it on a street car you will want the inner fender wells and want to watch for clearences. remember, you can make as much clearence as you want, you will just need to sacrafice other stuff.
If by takes alot to put more that a 17x9 on a fox you mean unbolting the old wheel and bolting the new one up then thats about it. Maybe a little bit of fender rolling and thats about it. I have 17x10.5's on the back of my 89 lx coupe and they fit fine.. Running 274/45's on it.. Had to trim the fenders just a bit and i have no problems,. Ill get some pics tomorrow.