We mocked the car up with 335's.  While they definitely would give a lot more protection during mooring, we were concerned that they would stick out too far and hit cones on the autocross.  (13.5" section width vs. 11.2" section width of a 285)
 
We are also looking at making some billet mounting chains for Rob now that our CNC is up and running.  Nothing looks worse than rusty chains all over the deck!