Progress!

Parts arrived early on Saturday, so I dove in. Plugs and MAF are now in, and the difference in how the car runs is night and day - apparently this problem has been in play since I got the car, so without a point of comparison I thought it was running fine - it wasn't until now. Idle is now glass smooth, and throttle response is markedly improved. O2 will be going in tonight - then the BIG trick will be seeing whether or not the rich condition has killed the cat. I've only driven the car about 100 miles like this, (mostly picking it up from seller) so I'm keeping my fingers very tightly crossed that it won't need a new cat as well.

Any tips on "cleaning" or restoring a cat that has been hit with too much fuel?