I had an early 66 blackface DR back in the day that was like heaven in a box. the most warm and sexy overdrive ever when turned out to 6.5 - 7. i can see turning one that loud, and putting an sd1 or tube screamer with the gain set high in front of it, and getting in that tonal area.
another vote for i wouldn't want my deluxe reverb to sound like that, though.