360 Advice Needed - Autocross / Street Engine Build

Cylinder heads just came in this morning! :)
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I'll cc a chamber this weekend to figure out the starting point, but a couple of spots I notice to work on:

1.) Spark plug threads:

Deshroud and blend exposed threads for hot-spots.
Any idea if there's water behind here?
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2.) Beside the valves:
Looks like there's some room to open up beside the valve to smooth the flow:
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3.) Between seats:
Smooth and eliminate the rough edges for flow during overlap
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