I am running the same set-up you are looking into. I started out with all three spacers on each side which I guess would be +4 and it worked great. It was a dead match to the front end. Someone I met in Glamis said to try taking two spacers out so the rear was just a bit narrower than the front. Since it only takes a couple of minutes to do, I tried it and it seemed to track a little better. Especially coming downhill off the throttle (fast). I don't know who he was or why this seemed to work, just try it for yourself. By the way, that IShock front end is the shiznit.