2019 summer race.... Jadaharabi vs 318willrun

Well, when I do heads, I normally check the valves for sealing with alcohol and light. However, this is more about a repair breaking loose in a short time down the road. It's the repair I question, even if the valve is sealing.
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I have 3 sets of magnum heads. I don't know if they are cracked or not but your welcome to find out.