http://www.gnttype.org/maint/quickref.html
02s jump all over the place, You look at 02s @ WOT
cc will tell you if your 02 is in good operation, they need to cycle thru a a fairly fast clip.
Youre not kidding about the cc's. I thought mine was fine, it would take about a minute to get to 255
Got a new AC Delco and it recycles every few seconds