The lift took quite a while. The rear was very easy we had it done the first day. The front however was much more involved. I started the lift on Dec. 23, did not work on Christmas, Finished on the following Sat. at 1:30 AM.
I get no rubbing! I did however move my front bumper out 5/8", and I also trimmed that plastic piece on the back side of the front fender well.
285 - 75 R16 have an overall diameter of 32.9" and are about 11.5" wide.
33 X 12.50 have a diameter of 32.4" and are about 12.5" wide.
You Should be OK.