Swapped the front (18x9, 255/40/18, +32mm) and rear (18x9, 255/40/18, +17mm - after +5mm spacer) wheels off the Dart this past weekend. I measured under my car and with new wheels I have room for wider tires... Yay! I don't know when I'll be able to afford them... Boo!

I was also looking under my car, but once I get my motor mounts fixed I think I could install resonators before my mufflers if I needed too.