This picture is of big drop #2. Satan's gut is big drop #3. The rock slab that makes the gut is in the upper right corner of this picture, past the pool, and at this level it is part of the shore on river left.
I have taken a baby J down at lower than 2700 and scraped both sides of the tubes as I went through the slot in big drop #3. At those low levels you just have to pick which rocks to bounce off of to get the best chance at getting through without being pinned. And with a baby J you sometimes have to straddle rocks to get through.