As far as 1970-era Stooges, the photos from around then in "I Need More" show Marhall heads and cabinets for both Dave Alexander and Ron Asheton. Asheton has 2 big-cabinet Marhall heads on their sides on the floor, presumably 100 watt. As for cabinets, he has 2 straight 4x12s stacked on top of each other, 2 slant 4x12s stacked on top of each other (the top one is upside down), and a weird cabinet that might be a tall 4x12. Not sure if any of those are acting as PAs.
As far as pedals, he has a couple, but I can't see what they are in the pictures. I always thought the fuzzes on the first Stooges album could be a Superfuzz in the non-notch setting, as they have TONS of intermodulation distortion - but I don't hear that much octave. Mosrite?
Sean Costello