I was just wondering if anyone knew what the minimum lift would be to fit a set of 255/85/16s on a 2nd gen with FJ TRD rims (4.5" BS). The UCAs shouldn't be an issue at all, and I'd think that you could stuff them easier too. As narrow as they are I wouldn't think it would take much, and I don't mind trimming. I also wouldn't mind a little rubbing with them fully stuffed.
The actual tire might make a big difference, too. The KM2s appear to have a pretty rounded tread profile, while the Toyo's and Cooper's look like a flatter/more boxy profile.