Champion radiator - I cut her open

Huh.
I bought my Champion radiator based on positive reviews and so far, it has been fine though admittedly, my motor isn’t asking a lot of the cooling system yet.

So I’m not sure how the radiator should have looked when cut open...seems normal to me but then again, I spend a very small percentage of my time thinking about radiators so maybe I don’t know what I’m talking about.

What setup do you have on the 440? How is it being driven? Did you already check the usual t-stat and water pump first? Did you flush/rule out obstructions in the cooling system?