His famous "Have you ever loved a woman" solo, from 4:40 to 6:00
https://www.youtube.com/watch?v=RBSaCAxJMdI
Both parts of the solo, but especially the the growl and that "wow" around 5:45 - 5:50.
I got somewhat close to the growl with overdrive but still not quite there. Definitely didn't manage the get the "wow"s.
While the drawbars are clearly visible, the rest seems a more intricate combination of amp and effects than my experience allows me to discover.
Tips and pointers appreciated