Any advice on my 440 recipe?

Hughes designed the Whiplash cam specifically for the low compression later motors to help build cylinder pressure. I am extremely happy with mine. If a piston change increases to more than 9:1, I would talk with them as you may have issues. People can speculate all they want, they likely never had one or tried them. There are engine builds with dyno sheets on their website.
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Dyno example below. Seems pretty damn healthy to me. Bring on the haters...