I just looked at my friends stock body 89 NA on eibachs and 18s and came to a conclusion...follow me through another thought experiment if you will.
Consider this: we have an 18x9.5+35 in the rear, with a 265/35, at stock height. For the sake of simplicity (this setup is actually a really nice easy one) this theoretical fitment rubs pretty hard at full compression. So, we roll our fenders flat, right? Well, because of the way it sucks in the wheel package, we could also throw coilovers on the car and drop it to where it's tucking a tiny part of the tire, and it shouldn't rub either...because the fender lip is about as wide as the clearance you gain from the drop. Doing both, you could run an extra 1/2" of rim/tire width on the outside of this package without pulling the fender. Pulling the fender (as BorHor has proved) can net us another 1" or so, if we're careful with tire selection, and we might be able to squeeze another 1/2" out of a good camber setting and even more scrutiny on tires.
BorHor, how did you manage to pull the fender that far anyways? Pie cut the lip and pull baby, pull?