It's actually two pictures of the same plug, just different sides of the plug. I was running Chevron (I run Chevron whenever I can find it) but barring that I run Shell (which is much more readily available to me than Chevron). It came from cylinder #6 (driver's side, second closest to the front of the car). Yeah, idle smells rich too, but I'm able to smooth out the idle considerably (lumpy cams) by richening even more, so I don't know what to do.

It's fuel injected (Bosch CIS injection aka Bosch K-Jetronic...not to be confused with CIS-E/KE-Jetronic, this is much more like a mechanical injection than that).