Holley/Demon Carb stumble

So the object of tuning the MAB is to equalize air fuel ratio throughout the full rpm range, of full throttle...? But don't you want it to get slightly richer as you head to the top of your rpm? in other words say when you first start pulling at full throttle your o2 reads say 12.0 at the top of the rpm range shouldn't it be say, mid 11 or am i thinking backwards.

My car was down 1.5 mph, and a tenth and a half (0.16) My 60 foot was right in line(1.7XX)
I'm giving the air a lot of credit for the loss of ET and MPH. but i don't think thats all of it. I think it needs more tuning, but not smart enough to now which way to go.

I know my idle circuit is **** and need some help, but until i get some long extensions on my collector my o2 meter is worthless.
I pulled a spark plug out today and took a couple of pictures of it. these are old spark plugs.....at least a year or so old spark plugs and the plug was removed this morning before i started it, and pull it off the trailer. The one picture show the base ring as shiny or wet/oil. It is not, it is vary dry.

Tell me what you think.