DEVILDOG,
Not sure if this helps you or not. I am running 16x10 wheels with a 5" offset. I am running 305/70-16 size tires. I have some rubbing when going in reverse and turning or under extreme wheel travel while turning.
AT this point though I haven't determined where it is rubbing.
It is a very minor thing for me so I haven't put alot of effort into locating it.