It's got me rethinking my rear tubs a bit. Might do a full tub with a raised opening so I can tuck more in the rear with a c notch in the rear frame rails.
Here's a couple shots of me confusing myself over all this.
The first is a 325/50/15 (was considering this before going for pro-touring, and wanted to see what the limits are for a tubbed space). It shows what I believe to be the lower limit allowing 3 1/2" of suspension travel.
The second one is a 245/45/18 (I'm planning a 285/40/18 ) also at the lowering limit.
The third is the 325 crammed in there. It's close to the upper tub and would require mod of the outer well which interferes well before the 1/4 panel lip.