That's probably a pretty good width. Not sure what the disks will do but id guess push the wheels out. If it measures out around 5.5" backspace you should be able to find wheels at a decent price and size for what ever style you want but it will take some measuring. Do you have the axles?
My measurements make me think i can use a 295/65/15. I have them already but I think the 295/55/15 would fit better.
295 60 d15 , no rub, not sticking out, just a 3/4'' offset spring hangar kit , and a stretched front wheel opening '' before paint ''.