Help with my first engine build (5.9 Magnum)

Cam bearings knocked out today and started cleaning valves.

Questions
:

1. I noticed some scoring in the block after knocking out the cam bearings. Is this something to worry about? The rear most bearing hole (I don’t know the actual term) was the most scared up. It’s in the picture below.

2. When cleaning valves, is it okay to soak them in parts cleaner to help soften the carbon build up?

3. Can I use a brass wire brush on the valves, or is that too harsh for them?

I started cleaning them with wd40 and a scotch bright pad. But can’t get it completely clean with that method.

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