95TAVERT

Looking to go as narrow as I can on rearend without mini tubs, I have trimmed the wheel lips and cut a lot on inner body, prior to inner body trim I had to run a 1/2 in spacer afterwards I could run without spacer, so I definitely gained some room. Right now I have a 9 in that is narrowed 1 in on each side and running 28x12x18 MT tires with no spacers. I have about 3/4 of in on inside and 3/4 on outside.

So what's the widest 28 in tire that anyone has inside rear fender wells?
And what is the narrowest rearend without mini tubing?