Scroll down to 'effects':
http://www.sonicyouth.com/mustang/eq/gear.html
Looks like it's a relatively small set-up (by comparison to complete gear monsters like the Edge/ Kevin Shields).
Honestly though, you're better off going down the playing route. A lot of SY's early greatness was due to not having much in the way of effects and using physical mods rather than falling back on pedals. A pedal isn't a shortcut to creativity.
Though I say that, there's good in most techniques - Keith Rowe, Kevin Drumm, My Cat is an Alien - all worth checking out (this is, obviously, a massively incomplete list).