IRS camber for autocross

[CraigS]

I have upgraded my Factory Five roadster to the FFR IRS based on 2015 Mustang bits. My question is what camber to run w/ 315 A7s for autocross. My only reference is a well known FFR track racer who runs in the high 2s front and rear. I am thinking though, that at autocross speeds w/ my 351 based 408, that I could lose straight line traction more then the road course car would. I have been running -3 in the front for a couple of years w/ good results and tire temps. Thoughts guys?