A couple of questions/comments:
1. What size rim are you looking at and what is the backspace/offset? The backspace or offset will make a difference as to whether the tire you want will fit.
2. Your stock 15x7 rims will accommodate the 235/60/15. Remember the Foxbody's had a 15x7 stock wheel (both 10 hole and turbines) that came with 225/60/15. The 235s are only 5/8" taller than your stock 205/65/15 (26.28" vs 25.66"). You likely don't need any lift to accommodate.
Not sure what you are thinking about for a lift kit, but I have never seen such an animal. Just Mustangs installed on 4x4 chassis. Like this one I saw advertised recently...