Hey Crazy'
I have hunted that several times in the past. I drew the rifle bull tag for that unit a few years ago. While I wasn't successful that year, my cousin did shoot a nice satellite 5x5. I of course saw three spike bulls but held out. I hunted every day of the season but ended up eating some pretty crappy tag soup. As to your question on 400" bulls, I don't think so. But I have personally seen some 340+ bulls in the past. Try looking around Government meadows up towards Dome Peak. There are several locked gate roads on the 1203 road system that might be worth the hike.
Kile