Am I reading that right......1/2" nitrous plate? Or 1/2" #2 plate?

If you're running nitrous, I'm going to be a little "iffy" on cam selection.
I never used it and have limited undersanding as to the changes that
optimize the use of the N2o. I do know N2o cams usually have wider LSA
and use more exhaust duration because of the extra spent gasses.

If you are using N2o, how much?

What your changes tell me is, it likes the extra traction of the wider tire, even
though the engine won't turn 7800 with them. What gears are you running?