I'm sure they are online somewhere. It's REALLY FAT. That squeeze pic rusty took doesn't do the spot justice. Even with the mirrors folded, there is probably only 1-2 inches on each side of clearance. Farther on in the trail, there is another spot that usually takes the right taillight out on fullsize rigs. The drivers side squeezes a rock and pushes the rig over at just the right time to catch the taillight and the pass side door. I cleared that tree by less than 1" and the drivers side sidewalls were rubbing as hard as they could.
I know a bunch of H1's went through one time, but I'm sure there are downed trees on the trail that weren't there back then.
I carry a chainsaw in case I run into a squeeze that I can't get through from a deadfall.